User's Manual

F32700N25.doc Page 14
[From: 172.16.64.1] Suspend Tx = 0 seconds
[From: 172.16.64.1] DHCP Client disabled
[From: 172.16.64.1] DHCP Server disabled
[From: 172.16.64.1] diag message level = 0
[From: 172.16.64.1] TFTP options = 512 (block size), 0
(interval)
[From: 172.16.64.1] Internal GPS not found
[From: 172.16.64.1] Modem FEC = on
Adjustment / Alignment Procedures
Receiver Injection
Perform the following steps to adjust the receiver injection frequency:
Step 1 Connect the RF output/input of HP8920 to the TX/RX antenna port of the
radio and HP RF probe to the antenna port of the service monitor.
Step 2 Enter the test frequency using the command ( For example
“frequency=0,799,769”). Set the reference calibration using the command
“reference calibration=128”. Measure the refmod voltage input to the tcxo
(at JMP1). It should be close to 1.50 volts.
Step 3 Select the monitor on TX measurement mode tune the measurement
frequency to the injection frequency. (for example 814 MHz)
Step 4 While monitoring the receiver injection frequency at RXINJ1, Select the
reference calibration number by using “reference calibration = x”. Change
the value of X (between 0-255) to obtain the minimum frequency error of< +/-
50 Hz. Record this value of x and the injection frequency on the Test Data
Sheet.
Step 5 While monitoring the 44.545 MHz 2nd injection frequency at U13 pin 4, adjust
trimmer capacitor CV10 to midway between the points where the oscillation
stops, then slightly turn to get the amplitude between -3 to 0 dBm. Measure
the frequency and make sure that is between 44.500 and 44.590 Record this
value on the Test Data Sheet.
Receiver Adjustment
Perform the following steps to adjust receiver:
Step1 Set the monitor in spectrum analyzer mode;