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0
INSERT PROBE control adjusts the input to the diode detector.
0
MOD OUT jack accepts 2-pole telephone plug for connection to oscilloscope or
high impedance headphones to monitor amplitude modulation.
2.3 CONNECTIONS
0·223~
:!:
·009"
Fig. 2.2 Cross section of type N connector (male)
showing critical dimension
A knurled retaining ring is fitted to the type N connector to prevent movement of
the detector unit during transit.
Before using the power meter, unscrew this ring and
pull off the plastic cap from the connector.
Keep both these items for re-use
if
the
instrument has to be transported.
!cAUTION
I
When making connection to the input socket it is important to use the
free type N connector supplied as an accessory.
If another type N
connector is used then it is essential to ensure good reliable mating.
To achieve this the inner contact depth, i. e. the distance from the
shoulder on the pin to the interface as shown in Fig. 2. 2, must be
0.223 in ±0.009 in (5.92 mm ±0.23 mm) conforming to US Spec.
MIL-C-71B.
Type numbers of coaxial cables suitable for use with the plug are as follows:
United Kingdom:
Amphenol No. 82-312
Joint Services 5935-99-943-4155.
United States:
Military No. UG-1185/U.
NOTE:
To prevent accidental interchange of parts with those of other instruments in
the series, the following items of the R. F. Power Meter TF 2502 are colour
coded YELLOW.
In addition identification labels, bearing the same serial
number, are fitted on each of the units which make up the complete instrument.
(a)
The plastic cover of the detector unit.
2502 (1a)
7
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