User's Manual

RPT 633
Page 5 - 8 TM1184 Issue 1
f) Increase the signal generator level by 20dB and re-adjust RV4 to give a
deviation corresponding to that given in Table 2(b).
g) Vary the signal generator frequency between 300Hz and 2.5kHz and check that
the deviation does not exceed that given in Table 2(d). If it does, tune to the
frequency that gives the maximum deviation and adjust RV4 to give a deviation
corresponding to that given in Table 2(e). This should also be the larger of the
Peak + or Peak - readings.
Table 2: Analogue Deviation
CHANNE DEVIATION DEVIATION DEVIATION DEVIATION DEVIATION
L (a) (b) (c) (d) (e)
SPACING kHz kHz kHz kHz kHz
kHz
25 ±3 4.75 ±3 5 4.9
20 ±2.4 3.8 ±2.4 4 3.9
12.5 ±1.5 2.4 ±1.5 2.5 2.4
10 ±1.2 1.85 ±1.2 2 1.9
VOX KEYING MODULE ALIGNMENT PROCEDURE
14. To set the timing circuits of the VOX Keying Module carry out the following
procedure:
a) With the RPE340 in the Engineering Mode, initiate Function 2, RPT calibration
signal. Alternatively use a P391 Test A7 to generate the same signal.
b) Monitor TP6 and adjust RV2 so that the mark/space ratio is 4.4/3.6ms.
c) Monitor TP3 and adjust RV3 so that the mark/space ratio is 2.6/5.4ms.
ANTENNA CUTTING
Introduction
15. In the event of damage to the antenna, the replacement will require cutting to length
in accordance with the following instructions.
Cutting
16. The antenna is a one piece UHF stub with internal connector. With reference to
Figure 1 after removal of the cap, the antenna should be cut to the length indicated
in Table 3, depending on frequency, and the cap replaced. The Part Numbers of
the uncut stubs are 5501-0001 (right angled) and 5501-0002 (straight).