Transmit Deviation Limit Alignment: Reference Softpot - Motorola HT 1000 User Manual

Transmit Deviation
Limit Alignment:
Reference Softpot
BBF
Programming Procedure
34
From the MAIN MENU, press F2 twice and then F6 to access this
screen.
MOTOROLA Radio Service Software
HT/JT1000/VISAR Model:
Serial:
SERVICE:XMIT ALIGN:XMIT DEV LIM REF

Transmit Deviation Limit Alignment: Reference Softpot

----------------------------------------------------
Test Current Value
Frequency Channel Spacing
12.5 kHz
177.97500
0
MIN |----+----+----+----X----+----+----+----+----+----+----+----| MAX
F1 F2 F3
HELP
Reference Attenuator Alignment is required after replacement or servicing of
the Controller Board or the RF Board. This alignment procedure limits the
modulation of the baseband signal. It is used for secondary
modulation limiting.
The reference frequency is displayed on the left side of the screen. The
reference softpot is displayed on the right side of the screen. A bar at
the bottom of the screen shows the current setting in relation to the
minimum and maximum settings.
Refer to the Radio Service Manual for the Transmit Deviation Limit
Alignment: Reference Softpot procedure.
This procedure should be attempted only by qualified
!
service personnel. Failure to perform alignment
procedures properly may result in seriously degraded
Caution
radio or system performance.
1. Press F6 to key up the radio. (The radio's RF output must be
terminated into a 50 ohm load.)
2. Apply the appropriate signal according to instructions in your
Radio Service Manual.
3. While transmitting, modify the Reference Attenuator setting using
the UP/DOWN arrow keys. To increase the adjustment speed, use
the Shift-UP/DOWN arrow keys.
4. A relative Tx power value will be displayed, but you must measure
the actual transmitter deviation from the service monitor.
5. Press F6 to de-key the radio and Tab to move between frequency
points.
6. Press F8 to save the new values.
Use<:or <SHIFT><<SHIFT>:keys to change
and <ENTER> to go to next softpot.
20 kHz
87 114
F4 F5 F6 F7
TOGGLE
PTT
New Softpot Value
Channel Spacing
12.5 kHz 20 kHz
87 114
127
F8 F9 F10
PROGRAM EXIT
VALUE