Purpose: To describe the RIK0092A Fixture Step Attenuator and its use.
The RIK0092A Fixture Step Attenuator is a high bandwidth attenuator programmable to four seperate attenuation settings. Settings are programmable between 0dB and 36dB (3dB - 39dB actual loss @ 100KHz). Test data shows that it has a usable bandwidth exceeding 9GHz (plot markers are at 6GHz and 9GHz).
Top View
Pin Out
Pin# |
|
|
J1 | Attenuator Input or Output | Attenuator is Symetric |
J2 | Attenuator Input or Output | Attenuator is Symetric |
Attenuator Setting (dB) | Switch Code |
0 | S# 0000 |
12 | S# 1001 |
24 | S#1111 |
36 | S# 0110 |
Coding Requirements:
 Fixture Carrier Position# | Switch Code Prefix |
M1 | S1 |
M2 | S2 |
M3 | S3 |
M4 | S4 |
M5 | S5 |
M6 | S6 |
M7 | S7 |
M8 | S8 |
M9 | S9 |
M10 | SA |
RF Attenuator Control Programming:
1. When writing to a Smart Carrier Cbit the format is of S#XXXX
S = S, # = Module number being written to, X = 1, X, or 0.
0 = closed (0V) and 1 = open (5.0V)
Bit position = S# DS1 DS2 DS3 DS4
Fixture requirements:
1. Smart Carrier (RIK0014A or B (12RF) or Later (20 RF).
2. Press in connector strips ( 16 pin ) installed at desired module locations ( M1 - M10).
3. Bench Top DC Voltage Requirements: +5V / -5V
Attenuator Electrical Specs
| Parameter | Typical | Units |
| Min Insertion Loss | 3dB @ 100KHz | dB |
| Minimum Freq | DC | MHz |
| Maximum Freq | 9GHz (See Plot) | GHz |
| Max insertion Loss (Settings) | 0 - 36 in 12dB steps | dB |
| Return Loss | See Plot | dB |
| Input Power 1dB | 21 | dBm |
| IIP3 | 40 | dBm |
| tRISE, tFALL (10%/90% RF) | 150 | ns |
Electrical Performance:
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