Specifications

41D2355 4-WAY SPLITTER UHF
PUB13-01 Rev 0 Mar 4, 2013 1
8 AMPLIFIERS TEST
1. Disconnect Power Supply from 4-Way Splitter PCB. Plug AC power cord. Check for 12VDC. Plug
J7 into PCB. Check front panel LED that indicates 12VDC from power supply. Check front panel
LED that indicates FAN operation.
2. Set the network analyzer frequency range from 470MHz to 860MHz.
Terminate the outputs of the Splitter.
Set network analyzer output power to 0 dBm.
Calibrate the analyzer for transmission measurement from J1 input to J102 output.
Set GAIN potentiometers for maximum gain for all 4 channels.
Check RF Switch function. Check the RF level at J2 input referenced to J1 input. It shall be
lower at least 55dB. Apply +5VDC to the J3-6/TELEMETRY-8. Check that channel #1 output
was reduced at least 55dB. Move the signal source to J2 input. Check Channel #1 output.
Remove +5VDC from J3-6/TELEMETRY-8. Check that channel #1 output was reduced at least
55dB. Move the signal source back to the J1 input.
Check GAIN adjustment range. It shall be at least 5dB. Adjust all channels gain to be 1dB less
than lowest maximum gain of all channels.
Check RF MUTE function by shorting J3-8/TELEMETRY-9 to GND. The output levels shall be
reduced by at least 25dB.
3. Set the network analyzer center frequency to 600MHz and SPAN to 5 MHz. Set frequency marker
to 600MHz.
Terminate the outputs of the Splitter.
Set network analyzer output power to 0 dBm.
Calibrate the analyzer for transmission measurement including channel 1.
Check phase adjustment range for channel 1. It shall be minimum 50 deg. Set channel 1 phase
in the middle of the adjustment range.
Calibrate again the analyzer for transmission measurement including channel 1.
Check adjustment range and adjust phase for all other channels referenced to channel 1
according to Table 1.