Atec Agilent-8568b-8566b - Manual (Page 6)

6
85685A RF Preselector
The following instrument specifications apply to the 85685A RF preselector (RFP).
85685A RF preselector input
Parameter Specification
Input #1 Input #2
Frequency range
RFP bypass1 20 Hz – 50 MHz 20 MHz – 2 GHz
DC – 18 GHz (nom.)
Connector type
Fuse blow time BNC, 50 Ω (nominal)
< 0.1 sec for > + 35 dBm Type N, 50 Ω (nom.)
NA
Maximum safe input power
Average power
Impulsive signals
≥ 10 dB RFP atten.
≥ 20 dB RFP atten.
+30 dBm (1 Watt)
100 Watts peak for a 10 µs pulse
2,000 Watts peak for a 10 µs pulse11 (nom.)
+30 dBm (1 Watt)
NA
DC voltage 0 Volts
Standing wave ratio (SWR)12
10 dB RFP atten.
0 dB RFP atten.
RFP bypass
< 1.5:1
< 1.5:1 (nominal)
NA
< 1.5:1
< 2.0:1 (nominal)
< 1.5:1 (nominal)
Attenuator range
Linearity check 0 – 50 dB in 10 dB steps (nominal)
Add 3 dB (nominal)
Filter characteristics
Fixed filter BW (3 dB)
Tracking filter BW (3 dB)
Stopband attenuation
BW range = 10 kHz• 1 MHz (nom.) for input < 2 MHz
10% (nom.) of tuned freq. for input = 2 – 55 MHz
5% (nom.) of tuned freq. for input = 55 – 500 MHz
20 MHz (nom.) for input = 500 – 2000 MHz
> 40 dB (nominal)
Preamplifier gain 20 dB (nominal) for 0 dB RFP atten.
85685A RF preselector output
Parameter Specification
Comb generator
Line spacing
Line amplitude
SWR
100 kHz, 500 kHz, 1 MHz, 5 MHz (nominal)
-40 to -60 dBm (nominal)
< 1.5:1 (nominal)
GPIB interface*
Private BUS
Public BUS interface functions (public BUS) Digital BUS and sweep control between RFP and SA
IEEE 488-1978 BUS
SH1, AH1, T6, L4, SR1, RL1, PPO, DC1, DT1, C0, E1