Flann Microwave
SD5902 Waveguide Switch Driver
SD5902
Doc No ER15 Version 1.3
June 2020
7
INSTALLATION
Interconnection of System Components
The SD5902 Waveguide Switch Driver may be connected to other GPIB instruments using standard
IEEE488 (GPIB) cables. Users should pay particular attention to the cable length limitations: total length
less than 20 m (60 ft), maximum 2 m between GPIB devices.
Waveguide Switches may be connected to the Waveguide Switch Driver via the 2 m (6ft) cables supplied.
Alternatively, any length of cable up to 5 m (16 ft) may be supplied on request or made up by the user.
Table 1 shows the wiring details for the 15-way D-type connector
Pin No.
Function
1 Large
Motor
2 Motor
Phase
5
3 Motor
Common
4 Motor
Phase
1
5 Motor
Phase
3
6 Motor
Phase
2
7 Motor
Phase
4
8 Logic
0v
9 LNT
(Precision
Mode)
10 Not
Used
11 Logic
+5v
12
Output 1 (P1-P2, P3-P4)
13
Output 2 (P1-P3)
14
Output 3 (P2-P3, P1-P4)
15
Output 4 (P2-P4)
Table 1: 15-way D-Type Connections
Use connectors with a casing that incorporates earth terminals and connect the cable screen at both ends to
ensure earthing integrity.
Failure to do so may allow EMI radiation to exceed acceptable levels when
the motor is running.
NOTE: All pins, other than Pin 10, must be connected regardless of the type of switch in use.
Care of Microwave Flanges
The microwave flange surfaces require careful handling to ensure consistent results and long life. In
particular, avoid scratching, over-tightening the screws, or leaving the flange surfaces unprotected. Always
cover the flanges with the protective covers supplied with the switch to prevent ingress of dust, etc., when
not in use.
WARNING:
Any grit or protrusions on flange surfaces will cause damage to the mating flange. Before
mating flanges, each surface should be cleaned with alcohol to remove any grease or particles which may
have accumulated, and inspected to ensure that the flange is undamaged. Ensure that debris from cleaning
materials is not deposited into the waveguide apertures during the cleaning process.
Do not, at any time, insert objects into the waveguide ports as the slightest damage to the inner
surfaces will impair the microwave performance of the switch.
