Setting Tracking Data, Parameter Limit, Sinad

LBI-39175A

SETTING TRACKING DATA

Normally, Tracking Data is set at the factory, and need not be re-loaded. However, the following repair situations require re-loading some or all of the Tracking Data:

SITUATION	NEW TRACKING DATA

Replace PA module	RF Power, Squelch (Check: Re-load if necessary.)

Replace TXRX module	RF Power, Modulation Deviation, Squelch, Feature
	Encryption, and Data Offset

Replace Control Unit module	None

Replace Synthesizer PWB	Modulation Deviation and Data Offset

Replace Logic PWB	RF Power, Squelch, Modulation Deviation, Feature
	Encryption, and Data Offset.

To re-load Tracking Data, connect the radio in the appropriate configuration as shown in Figures 2 and 3, and perform the following steps:

1.Using the PC Programming Software , make sure the radio is programmed in the following sequence:

Parameter	Limit
TX Modulation Deviation
30 kHz channel spacing	4.4 ±0.1 kHz
12.5 kHz channel spacing	2.25 ±0.1 kHz

a.Customer Operational Software (if necessary)

b.Tracking Data (First Iteration -- Tracking Data originally shipped with the radio is a good starting point.)

TX High Power	110 W Model	110 +4, -0 W
	50 W Model	50	+2, -0 W
	25 W Model	25	+0, -1 W
TX Mid Power	25 W Model	15	+.5, -.5 W

c.Feature Encryption File (if necessary). Note: In order to load an Encryption File into a new Logic PWB, After Market Services must first be contacted at 1-800-368-3277 for authorization code. Otherwise the file will not load.

d.Personality, which contains a Conventional System using the frequencies given in Tables 2 and 3.

2.Connect the radio unit in the normal operating configuration. Activate the radio unit, and, using a Service Monitor HP8920A or equivalent, measure the Transmitter Power, Modulation Deviation, and Squelch Threshold for each of the applicable frequencies given in Tables 2 and 3. Measurements should be within the following limits:

TX Low Power 110 W Model	55	+2, -0 W
50 W Model	25	+1, -0 W
25 W Model	6	+.5 -.5 W
RX Squelch Threshold	8	+1, -0 dB
	SINAD

3.If measurements are within the limits, the job is complete. If the measurements are not within the limits stated, re-connect the Programming Maintenance Software "MRKMAINT." Display the Tracking Data screen. For those frequencies where measurements are not within the stated limits, enter new Tracking Data, following instructions on the screen. Program into the radio personality, and exit.

4.Repeat Steps 2 and 3 until the measurements at every frequency given in Tables 2 and 3 are within the limits specified.

SETTING TRACKING DATA

SITUATION

NEW TRACKING DATA

Parameter

Limit

SINAD