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1795-XX Service Channel Translator

  
The 1795-XX Service Channel Converter is a complete single sideband modulator/demodulator. The baseband inputs are divided into three channels. Channels 1 and 2 are to be used for baseband frequencies between 300Hz and 12kHz. Channel 3 is designed for baseband frequencies between 16kHz and 108kHz typically used for 24 channel multiplex. The transmit output has four separate outputs for driving separate sources. Conversely, the receive input has four separate inputs for multiple source applications. frequencies are factory set and can be 5.4, 5.65, 7.045, 7.5, 8.3, 8.59, 8.85, 9.023, or 9.25 MHz. Line power can be specified as 115 VAC, 230 VAC, -24 VDC, or -48 VDC.

 


 1795-XX Service Channel Converter


 1795-XX Service Channel Block Diagram

Equipment Specifications*
 

Transmit/Receive Loop
Freq Response CH1/CH2; CH3
Signal to Noise CH1/CH2
Harmonic Distortion CH1/CH2
Freq Stability, Temp (10-40 deg C)
Freq Stability, Aging Rate (1st yr)		 ±2dB; ±0.5dB/4kHz, ±2dB Total
60dB
< 1%
±5X10^-7
±1X10^-8 / Day Avg, ±1X10^-6 / Year
Transit Inputs / Receive Outputs (CH1 & CH2 / CH3)  
Frequency
Impedance
Levels		 0.3 - 12 kHz / 16 - 108 kHz
600 ohms balanced / 75 ohms unbalanced
-20dBm Avg, -14dBm MAX / -20dBm MAX
Transit End-Output / Receive Input  
Type
Frequency
Bandwidth
Number of Out,In/Impedance
Level, TX Out/Total RX In
Lower Sideband/Carrier Rej.
Port to Port Isolation		 Single Sideband Suppressed Carrier
5.4, 5.65, 7.045, 7.5, 8.3, 8.59, 8.85, 9.023, 9.25 MHz
110kHz Nominal
4 each/75 ohms unbalanced
-16dBm MAX / -10dBm MAX
-30dB MAX Tx and RX / -40dBC MAX
-40dB MAX
Other
Mechanical
Power AC
Power DC
Connectors, Audio
Connectors, Subcarrier		 19 inch standard chassis; 1.75"H X 13"D, 8-3/4 lbs (4kg)
105-130 or 210-260 VAC, 47 - 63 Hz, 30W
-21 to -32 or -42 to -56 VDC, 375ma typ, 400ma MAX
Barrier Strip
BNC Female

*+10 to +40 degrees C; 2000m max elevation; 80% max humidity; Specifications subject to change without notice