GENERAL INFORMATION
1-6
Performance data
Carrier frequency
Range
Individual outputs:
10 kHz to 2.4 GHz with a resolution of 1 Hz.
Combined output:
800 MHz to 2.0 GHz with a resolution of 1 Hz.
Accuracy:
As frequency standard.
RF output
Range
Individual outputs:
−
137 dBm to +24 dBm (output power above +20 dBm is uncalibrated
for frequencies above 1.2 GHz).
Combiner output:
−
137 dBm to
−
3 dBm (output power above
−
7 dBm is uncalibrated for
frequencies above 1.2 GHz).
Maximum output is reduced by 5 dB when pulse modulation is
selected and/or by up to 6 dB when AM is selected, dependent upon
set AM depth.
Resolution:
0.1 dB or 3 digits for linear units.
RF level units:
Units may be set to
µ
V, mV, EMF or PD; dB relative to 1
µ
V, 1 mV,
EMF or PD; or dBm. Conversion between dB and linear units may be
achieved by pressing the appropriate units key (dB or V, mV,
µ
V). The
output level can be normalized for 75
Ω
operation with an external
impedance converter (applies to all outputs simultaneously).
Accuracy:
Output level
Up to 1.2 GHz
Above 1.2 GHz
Individual outputs:
(over a temperature range
of 17°C to 27°C)
−
127 dBm to <6 dBm
>6 dBm to 24 dBm*
Temperature stability
±0.8 dB
±1.0 dB
<±0.02 dB/°C
±1.6 dB
±2.0 dB
<±0.04 dB/°C
*
Accuracy is unspecified below 100 kHz for levels >6 dBm.
Combined output:
(over a temperature range
of 17°C to 27°C)
For output levels from
−
20 dBm to
−
35 dBm:
±0.75 dB, 865 MHz
−
895 MHz;
±0.75 dB, 1750 MHz
−
1990 MHz.
Attenuator hold:
Inhibits operation of the step attenuator from the level at which the key
is enabled. Usable for a level reduction of at least 10 dB. Typical
accuracy
±
3 dB.
VSWR
Individual outputs:
For output levels <
−
5 dBm, output VSWR is less than 1.5:1 for carrier
frequencies up to 1.2 GHz and <1.7:1 for carrier frequencies up to
2.4 GHz.
Output connector
50
Ω
type-N connector to MIL 390123D
.
Output protection
Individual outputs:
Protected against the application of reverse power to the output
connector for levels up 50 W from 50
Ω,
or 25 W from a source VSWR
of 5:1. Protection circuit can be reset from the front panel or via the
GPIB interface.
Combined output:
No reverse power protection.
Radio Connections
Path loss
INPUT FROM RADIO TEST
SET to CONNECTION TO
RADIO:
Typically
14 dB, 865 to 895 MHz;
15 dB, 1750 to 1990 MHz.
A mean calibration value subject to a frequency response of <±0.1 dB
across the frequency bands 865 to 895 MHz, 1750 to 1780 MHz and
1930 to 1990 MHz is supplied with each instrument. A measurement
uncertainty of ±0.25 dB applies to each path loss.
CONNECTION TO RADIO to
OUTPUT TO RADIO TEST SET:
Typically 13.5
dB
Isolation
>40 dB from CONNECTION TO RADIO to INPUT FROM RADIO TEST
SET with OUTPUT TO RADIO TEST SET terminated.
VSWR
INPUT FROM RADIO TEST
SET:
<1.2:1, 865 to 895 MHz;
<1.35:1, 1750 to 1990 MHz.
