Installation guide

Replaceable Parts
Hardware and Other Instrument Parts
3-82
Hardware of a Disassembled
AT1 High-Power Mechanical Attenuator (Option UNB)
and A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ)
Table 3-31
Item No. Description Qty Part
Number
1 bracket for AT1 High-Power Mechanical Attenuator (Option UNB) 1 E4400-00523
2 bracket for A28 Reverse Power Protection (Option 501, 502, 503, 504 or
Option UNJ)
1 E4400-00524
3 screw-machine (flathead screw used to attach the AT1 Mechanical
Attenuator to AT1 Mechanical Attenuator bracket)
2 0515-1227
4 screw-machine (flathead screw used to attach the AT1 Mechanical
Attenuator bracket to the A28 RPP bracket)
4 0515-0664
5 screw-machine (flathead screw used to attach the A28 RPP to the A28 RPP
bracket)
4 0515-0664
6 screw-machine (pan head screw used to attach the AT1 Mechanical
Attenuator and A28 RPP to the chassis)
2 0515-0430