null
Hughes

Hughes 3878523-100 Synchronous Command Generator 240VAC 2A AUSSAT Satellite

(No reviews yet) Write a Review
SKU:
41351
MPN:
3878523-100
Condition:
Used
Availability:
Usually ships within 1–2 business days.
Weight:
35.00 LBS
Shipping:
Calculated at Checkout
  • Hughes 3878523-100 Synchronous Command Generator — front panel with CRT display and CMD GEN 2 label, showing Clear Decoder, Transmit Command, Critical Enable, Fail Reset, and Execute buttons
  • Hughes 3878523-100 Synchronous Command Generator — rear and side panel showing Ext Controller (J4), Monitor Interface (J5), Command Tones Out BNC (J7/J8), FM RT Input BNC (J6), and Hughes Satellite Ground Equipment Division label
  • Hughes Synchronous Command Generator front panel close-up — CMD GEN 2 designation, dark CRT display, and five illuminated push-button controls with Hughes Aircraft logo
  • Hughes 3878523-100 rear panel left section close-up — Ext Controller D-Sub J4, Monitor Interface D-Sub J5, Command Tones Out BNC connectors J7 and J8, FM RT Input J6, and Hughes Satellite Ground Equipment Division identification label
  • Hughes 3878523-100 rear panel right section close-up — PCM Telemetry RS-232 D-Sub J3, TTL connector J9, Computer Interface D-Sub J2, Danger High Voltage sticker, 240 VAC 2A power input J1, SIG GND and E1 Chassis GND terminals, power switch S1
  • Hughes Satellite Ground Equipment Division identification label — shows SYS: AUSSAT, REV D, UNIT: Command Generator Assy, PN: 3878523-100, SER: 002, AUSSAT PTY. LTD. barcode label 00001330
  • Hughes Aircraft Company internal PCB close-up — A2 Assy 3814102 Rev F Synchronous Command Generator board with Motorola MC6850P and MC6850 ICs and multiple TTL logic chips visible
  • Hughes 3878523-100 interior overview — top-down view of chassis showing main Synchronous Command Generator PCB populated with ICs, ribbon cables, daughter cards on left side, and cooling fan
  • Hughes Aircraft Company internal PCB close-up — A3 Assy 3808473 Synchronous Command Generator board with Hughes Aircraft Company silk screen, J6 connector, and SN 024 serial marking
  • Hughes 3878523-100 interior second view — top-down view of chassis showing full PCB layout with ICs, ribbon cable connections, daughter card assemblies, and rear fan
  • Hughes 3878523-100 Synchronous Command Generator - 240VAC 2A - AS IS
$300.00
Was: $600.00
Current Stock: 1

Sold Out

Description

Hughes 3878523-100 Synchronous Command Generator 240VAC 2A AUSSAT Satellite

The Hughes 3878523-100 is a Synchronous Command Generator Assembly built by the Hughes Aircraft Company Satellite Ground Equipment Division, designed for use in the AUSSAT satellite ground station command system. This instrument encodes and transmits synchronous command tones to satellite transponders from a ground control facility, providing operators with the ability to send critical enable commands, fail/reset sequences, and execute instructions to an orbiting satellite. The unit is designated CMD GEN 2 and carries Revision D hardware, with two internal PCBs (A2 and A3 assemblies) visible inside the chassis.

Specifications & What's Included

  • Manufacturer: Hughes Aircraft Company, Satellite Ground Equipment Division
  • Part Number: 3878523-100
  • Unit Description: Command Generator Assembly (CMD GEN 2)
  • System: AUSSAT (Australian Satellite), Rev D
  • Power Input: 240 VAC, 2A (J1 IEC-style inlet, rear panel)
  • Power Switch: S1 ON/OFF, rear panel
  • PCM Telemetry Interface: RS-232 D-Sub (J3) and TTL BNC (J9)
  • Computer Interface: D-Sub connector (J2)
  • External Controller: D-Sub connector (J4)
  • Monitor Interface: D-Sub connector (J5)
  • Command Tones Out: Two BNC connectors (J7, J8)
  • FM RT Input: BNC connector (J6)
  • Signal Ground and E1 Chassis Ground terminals on rear panel
  • Front Panel Controls: Clear Decoder, Transmit Command, Critical Enable, Fail Reset, Execute (illuminated pushbuttons)
  • Front Panel Display: Built-in CRT/monitor display
  • Internal Board 1: A2 Assy 3814102 Rev F — Synchronous Command Generator PCB (Motorola MC6850P and additional TTL/CMOS logic ICs visible)
  • Internal Board 2: A3 Assy 3808473 — Synchronous Command Generator PCB (SN 024)
  • Form Factor: Rackmount-compatible benchtop chassis (approximately 4–5U)
  • Ventilated top cover; internal cooling fan
  • Includes chassis, all internal PCBs, and panel connectors as photographed

Applications

The Hughes 3878523-100 was purpose-built for the AUSSAT satellite ground station network — Australia's first domestic satellite system, launched in the mid-1980s and operated by AUSSAT Pty. Ltd. before the network was acquired by Optus. Synchronous command generators are a critical element of satellite ground control infrastructure: they encode precisely timed command sequences and transmit them uplink to satellite transponders, enabling ground operators to control satellite functions such as payload switching, attitude adjustments, and fault recovery. Hughes Aircraft Company's Satellite Ground Equipment Division was a major supplier of ground control hardware for both commercial and government satellite programs through the 1970s, 1980s, and into the 1990s. This class of equipment was typically found in dedicated satellite control centers and teleport facilities. Today, units like this are primarily of interest to satellite history researchers, aerospace museums, legacy system maintenance contractors, and electronics engineers working with or studying 1980s-era satellite ground infrastructure.

Condition: For Parts or Not Working
This Hughes 3878523-100 Synchronous Command Generator is being sold as-is for parts or repair and is not guaranteed functional. The unit is complete — the chassis, internal PCBs (A2 Assy 3814102 Rev F and A3 Assy 3808473), and all visible connectors and panel hardware are present. The exterior shows light surface wear and some discoloration consistent with age and storage, but no major physical damage is visible. Internal boards appear intact with no obvious broken components visible in photos. Because this is highly specialized satellite ground station equipment, we were not able to functionally test it, and it is sold strictly as-is. We may have multiple units in stock; the unit shipped may vary slightly from the one photographed but will be the same part number and configuration. Please view our photo set and contact us if you have any questions.
View AllClose

Warranty Information

We stand behind every item we sell with a 30-day money-back guarantee. If your item arrives not as described, you may return it within 30 days for a full refund. Please inspect your purchase upon arrival and contact us with any questions.
View AllClose

Additional Information

Brand:
Hughes Aircraft Company
Model:
3878523-100
MPN:
3878523-100
Type:
Synchronous Command Generator
SKU:
41351
Condition:
As-Is / For Parts or Not Working
Seller Notes:
Sold as-is; includes main chassis with internal PCBs and all visible connectors
Country/Region of Manufacture:
United States
Form Factor:
Rackmount Benchtop Chassis
Power Requirements:
240 VAC, 2A
Revision:
Rev D
System Compatibility:
AUSSAT Satellite Ground Equipment System
Division:
Hughes Satellite Ground Equipment Division
Unit Description:
Command Generator Assembly
Internal Board 1:
A2 Assy 3814102 Rev F — Synchronous Command Generator PCB
Internal Board 2:
A3 Assy 3808473 — Synchronous Command Generator PCB
Interface — PCM Telemetry:
RS-232 (J3), TTL (J9)
Interface — Computer Interface:
D-Sub connector J2
Interface — Ext Controller:
D-Sub connector J4
Interface — Monitor Interface:
D-Sub connector J5
Interface — Command Tones Out:
BNC connectors J7, J8
Interface — FM RT Input:
BNC connector J6
Front Panel Controls:
Clear Decoder, Transmit Command, Critical Enable, Fail Reset, Execute
Front Panel Display:
CRT/monitor display; CMD GEN 2 designation label
Serial Number:
002 (internal reference — not for storefront)
Application:
Satellite ground station command encoding and transmission
Compatible With:
AUSSAT satellite ground station systems
Manufacturer Division:
Hughes Satellite Ground Equipment Division
Condition Notes:
Hughes 3878523-100 Synchronous Command Generator sold as-is for parts or repair. Not tested, not guaranteed functional. Chassis and internal PCBs present. Unit shipped may vary from photo. Contact us with questions.
View AllClose

Related Products

Related Products

Hughes 3878523-100 Synchronous Command Generator front panel view showing display screen and CMD GEN 1 label with command buttons Hughes 3878523-100 Synchronous Command Generator front panel close-up showing Clear Decoder, Transmit Command, Critical Enable, Fail/Reset, and Execute buttons with CMD GEN 1 designation
Add to Cart
Quick view

Hughes 3878523-100 Synchronous Command Generator 240VAC Satcom 19" Rack

Hughes

$350.00
Was: $700.00
Hughes 3878523-100 Synchronous Command Generator 240VAC Satcom 19" Rack A 19" rackmount synchronous command generator manufactured by Hughes Aircraft Company for satellite ground station use. This...
41233
SKU:
41233
Availability:
Usually ships within 1-2 business days.
Weight:
35.00 LBS
Brand:
Hughes Aircraft Company
Model:
3878523-100
MPN:
3878523-100
Type:
Synchronous Command Generator
SKU:
41233
Condition:
As-Is / For Parts or Not Working
System:
AUSSAT Satellite Ground Station
Division:
Hughes Satellite Ground Equipment Division
Power Requirements:
240VAC
Form Factor:
19" Rackmount
Front Panel Designation:
CMD GEN 1
Internal Assembly A2:
Hughes A2 Assy 3814102 Rev F
Internal Assembly A3 (1):
Hughes A3 Assy 1404473 Rev (Synchronous Cmd Gen)
Internal Assembly A3 (2):
Hughes A3 Assy 3808473 Rev — (Synchronous Cmd Gen)
Crystal Oscillator:
Vectron SC-235T-3, 4.1Hz (ref), Vectron Labs
SPD Part Number:
SPD Industrial Electronic Engineers 04202-01
SPD Code Ident:
05464
Front Panel Controls:
Clear Decoder, Transmit Command, Critical Enable, Fail/Reset, Execute
Front Panel Display:
Integrated display screen (appears dark/non-operational)
Seller Notes:
Sold AS-IS for parts or repair. Multi-board rackmount assembly.
Country/Region of Manufacture:
United States
Application:
Satellite ground station command generation, AUSSAT system
Compatible With:
AUSSAT satellite ground station system
Condition Notes:
Hughes 3878523-100 Synchronous Command Generator sold AS-IS for parts or repair. Not tested, no functionality guaranteed. Front display appears non-operational. Internal PCBs intact. Unit shipped may vary from photo.
SSEL Hughes 7746600-100 Satellite Command Generator VME rack front panel with status indicators and power supply status LEDs SSEL Command Generator front panel PWR SUPPLY STATUS section showing +12V, -12V, +5V indicator lights and banana jack test points all illuminated green
Add to Cart
Quick view

SSEL Hughes 7746600-100 Satellite Command Generator VME Rack 7746604-100

Hughes

$2,200.00
Was: $4,400.00
SSEL Hughes 7746600-100 Satellite Command Generator VME Rack 7746604-100 7U VMEbus rackmount chassis designed for satellite ground station command and control operations. Houses five VME cards for...
39399
SKU:
39399
Availability:
Usually ships within 3-5 business days due to size and packaging requirements.
Weight:
61.00 LBS
Brand:
SSEL (Satellite Support Equipment Laboratories)
Model:
7746600-100
MPN:
7746600-100
Secondary Model:
7746604-100
Firmware Part Number:
7729349-100
Type:
Satellite Command Generator VME Rack
SKU:
39399
Form Factor:
Rackmount, 7U
Rack Units:
7U
Bus Architecture:
VME (VMEbus)
Included Card 1:
Force Computers SYS68K CPU-4VC, P/N 100413
Included Card 2:
Motorola VMEmodule MVME 335, P/N 01-W3530B
Included Card 3:
Tone Analog, P/N 7729257 / 7729257-099
Included Card 4:
RZ Tone Digital, P/N 7742917
Included Card 5:
Utility, P/N 7742911
Power Supply:
Lambda LND-Y-152, 105-127V or 210-250V AC, dual output
Power Supply Input:
105-127 VAC or 210-250 VAC, 47-63 Hz
Power Supply Output:
+12V, -12V, +5V DC (banana jack test points on front)
Rear Connectors:
D-sub (J6-J9), BNC tone output (J3-J5), IEC AC inlet
Rear Interfaces:
Computer J6, Backup J7, CED J8, TCDU J9, ICU J10, Status J11
Tone Output Connectors:
BNC: RZ1 (J3), RZ2 (J4), SGLS (J5)
Command Trigger:
BNC connector J2 (rear panel)
Front Panel Indicators:
Unit Status: uP, Omni Ready, Incremental Commanding, Back-Up Commanding, Self-Test; Activity: Computer, CED
Dimensions:
25" L x 19" W x 12.25" H
Application:
Satellite ground station command and control
Compatible With:
Hughes / SSEL satellite ground support systems
Country/Region of Manufacture:
United States
Condition:
Used – Powers On, Not Fully Tested
Seller Notes:
VME rack loaded with all cards listed. Powers on and lights up.
Condition Notes:
SSEL Hughes 7746600-100 Satellite Command Generator VME rack powers on and front panel LEDs illuminate. Not fully tested at our facility. All 5 VME cards present. Good cosmetic condition. Contact us with questions.
Hughes 3814100-100 Synchronous Command Generator – front panel view showing touch entry display and control buttons Hughes 3814100-100 Synchronous Command Generator – rear panel showing connectors, fan, power inlet, and interface labels
Add to Cart
Quick view

Hughes 3814100-100 Sync Command Generator Galaxy II/III Satellite Ground

Hughes

$400.00
Was: $800.00
Hughes 3814100-100 Sync Command Generator Galaxy II/III Satellite Ground RF synchronous command generator used in Hughes satellite ground control stations. This unit generates and transmits command...
39424
SKU:
39424
Availability:
Usually ships within 1-2 business days.
Weight:
35.00 LBS
Brand:
Hughes Aircraft Company
Model:
3814100-100
MPN:
3814100-100
Type:
RF Synchronous Command Generator
SKU:
39424
Secondary Model:
3814102 / 3808473
System Compatibility:
Galaxy II / Galaxy III Satellites
Division:
Hughes Satellite Ground Equipment Division
Assembly A2:
ASSY 3814102 REV F
Assembly A3:
ASSY 3808473 REV D
Power Requirements:
120 VAC, 2A
Form Factor:
Rackmount
Display:
IEE / PEP Interactive Touch Entry Display (MD: 04282-01)
Interface – PCM Telemetry:
RS-232 (J3), TTL (J9)
Interface – Computer:
Computer Interface connector J2 (DB-25 style)
Interface – Ext Controller:
EXT Controller J4 (DB-9 style)
Interface – Monitor:
Monitor Interface J5 (DB-15 style)
RF Outputs:
Command Tones Out – J8, FM RT Input – J6, J7
Front Panel Controls:
Clear Decoder, Transmit Command, Critical Enable, Fail/Reset, Execute
Condition:
As-Is / For Parts or Not Working
Seller Notes:
Sold as-is for parts or repair. Unit may vary from photo.
Country/Region of Manufacture:
United States
Condition Notes:
Hughes 3814100-100 Sync Command Generator sold as-is for parts or repair. Not tested, no functionality guaranteed. Chassis shows age wear; interior boards present and visually intact. Please contact us with questions.
Hughes 3878540-100 Ku-Band Command Upconverter – front panel view showing monitor ports, LED indicators, sweep controls, and HUGHES branding Hughes 3878540-100 front panel close-up showing Input Monitor, Output Monitor, 14180 MHz Monitor, 248.5 MHz Monitor, and Sweep Monitor BNC ports with security chains
Add to Cart
Quick view

Hughes 3878540-100 Ku-Band Command Upconverter 14180 MHz Satcom AUSSAT 4U

Hughes

$600.00
Was: $1,200.00
Hughes 3878540-100 Ku-Band Command Upconverter 14180 MHz Satcom AUSSAT 4UKu-Band command upconverter designed for AUSSAT satellite ground equipment. Converts IF signals at 248/248.5 MHz to 14180 MHz...
41247
SKU:
41247
Availability:
Usually ships within 1-2 business days.
Weight:
33.00 LBS
Brand:
Hughes Aircraft Company
Model:
3878540-100
MPN:
3878540-100
Type:
Ku-Band Command Upconverter
SKU:
41247
System Compatibility:
AUSSAT Expansion Rev. D
Output Frequency:
14180 MHz
IF Frequency:
248 / 248.5 MHz
Frequency Band:
Ku-Band
Power Requirements:
240 VAC, 1A, 50/60 Hz
DC Voltages:
+28V, -15V, +24V, GND, 0V
Form Factor:
4U Rackmount
Monitor Ports:
Input, Output, 14180 MHz, 248 MHz, 248.5 MHz, Sweep
RF Connectors:
J2 RF IN, J3 RF OUT, J4 248.5 MHz Output (BNC)
Control Interface:
J5 Status & Control – DB9 Serial (9-pin)
Power Connector:
J1 IEC 240VAC inlet with 1A fuse
Chassis Ground:
E1 Chassis GND binding post
LED Indicators:
Sweep Loss / Freq Shift, Phase Unlocked
Voltage Indicators:
+28V, -15V, +24V LED status lights
Front Panel Controls:
Sweep Deviation knob, Sweep Rate knob, Level Set switch, SPOT/OMNI switch
Sweep Features:
Adjustable Sweep Deviation and Sweep Rate
Serial Number:
011
Revision:
Rev. D
Division:
Hughes Satellite Ground Equipment Division
Country/Region of Manufacture:
United States
Condition:
Used – Powers On, Pulled from Working Environment
Seller Notes:
Unit powers on at our warehouse. Sold as pictured; no accessories included.
Condition Notes:
Hughes 3878540-100 Ku-Band Command Upconverter. Inspected, good used condition. Pulled from working satcom environment; powers on at our warehouse. Normal service wear. Please contact us with any questions.