DANIELS
ELECTRONICS LTD.
TM
4-2
IM10-VR3H040-AB VHF Enhanced Extra Wideband Receiver Instruction Manual
4.3
Printed Circuit Board Numbering Convention
To ease troubleshooting and maintenance procedures, Daniels Electronics Limited has adopted a
printed circuit board (PCB) numbering convention in which the last two digits of the circuit
board number represent the circuit board version. For example:
•
PCB number 43-912010 indicates circuit board version 1.0;
•
PCB number 50002-02 indicates circuit board version 2.0.
All PCB's manufactured by Daniels Electronics are identified by one of the above conventions.
4.4
Recommended Test Equipment
Alignment of the receiver requires the following test equipment or its equivalent.
Power supply - Reg9.5 Vdc at 2 A. Phillips PM 2811
Oscilloscope / Multimeter - Fluke 97 Scopemeter
Spectrum Analyzer with Tracking Generator
Radio communications test set - Marconi Instruments 2955R
Radio communications test set - Marconi Instruments 2965A
Alignment Tool - Johanson 8764
Alignment Tool - Johanson 8766
Alignment Tool - Johanson 4192
Alignment Tool - Coilcraft 37-1409
It is recommended that the radio communications test set be frequency locked to an external
reference (WWVH, GPS, Loran C) so that the high stability local oscillator may be accurately
set to within its ±1 ppm frequency tolerance.