Atec Agilent-E4438C - Manual (Page 7)

7
Level accuracy with digital modulation turned on [relative to CW]
Conditions: [with PRBS modulated data;
if using I/Q inputs,
√
I 2 + Q 2 = 0.5 V
rms
, nominal] 1
Level accuracy with ALC on
π/4 DQPSK or QPSK formats
Conditions: With raised cosine or root-raised cosine filter and a
≥ 0.35;
with 10 kHz ≤ symbol rate ≤ 1 MHz; at RF freq ≥ 25 MHz;
power ≤ max specified –3 dB
Option 501-504 Option 506
±0.15 dB ±0.25 dB
Constant amplitude formats [FSK, GMSK, etc]
Option 501-504 Option 506
±0.1 dB ±0.15 dB
Level accuracy with ALC off
1, 2
(±0.15 dB) [relative to ALC on]
Conditions: After power search is executed, with burst off.
Level switching speed 1
Option 501-504 With Option UNB Option 506
Normal operation [ALC on] (< 15 ms) (< 21 ms) (< 21 ms)
When using power search manual (< 83 ms) (< 95 ms) (< 95 ms)
When using power search auto (< 103 ms) (< 119 ms) (< 119 ms)
Specifications for Frequency and Power Characteristics
1. Parentheses denote typical performance.
2. When applying external I/Q signals with ALC off, output level will vary directly with I/Q input level.