GENERAL INFORMATION
1-7
CONNECTION TO RADIO:
<1.6:1 (typically 1.25:1), 865 to 1990 MHz.
OUTPUT TO RADIO TEST
SET
<1.35:1, 865 to 1990 MHz.
Maximum safe power (matched)
INPUT FROM RADIO TEST
SET
+19 dBm.
CONNECTION TO RADIO:
+33 dBm.
OUTPUT TO RADIO TEST
SET:
+33 dBm.
Spectral purity
Harmonics:
Individual outputs:
Typically better than
−
30 dBc for RF levels up to +6 dBm, typically better
than
−
25 dBc for RF levels up to +18 dBm (+14 dBm above 1.2 GHz).
Combined output:
Typically better than
−
30 dBc for RF levels up to
−
36 dBm, typically
better than
−
25 dBc for RF levels up to
−
13 dBm.
Non-harmonics:
Better than
−
70 dBc for carrier frequencies up to 1 GHz;
better than
−
64 dBc for carrier frequencies above 1 GHz;
better than
−
60 dBc for carrier frequencies above 2 GHz.
Isolation:
Better than 80 dB between individual outputs in use.
Better than 60 dB from a used individual output to the CONNECTION
TO RADIO.
Intermodulation:
At an RF output level of
−
22 dBm at the CONNECTION TO RADIO:
Frequency:
2-tone intermodulation:
800 MHz to 2 GHz
−
80 dBc
Intermodulation levels reduce with reducing RF levels.
Residual FM (FM off):
Less than 4.5 Hz RMS deviation in a 300 Hz to 3.4 kHz unweighted
bandwidth at a carrier frequency of 1 GHz.
Typically less than 1 Hz at 249 MHz; less than <3 Hz at 1001 MHz.
SSB phase noise:
Better than
−
124 dBc/Hz at 20 kHz offset from a 470 MHz carrier.
Typically better than
−
121 dBc/Hz at 20 kHz offset from a 1 GHz carrier.
RF leakage:
Less than 0.5
µ
V at the carrier frequencies into a two
-
turn
25 mm-diameter loop 25 mm from the surface of the signal generator.
Modulation
FM, AM or phase modulation can be applied to the carriers generated
by each signal source from independent internal or external modulation
sources. The internal modulation sources are capable of generating
two simultaneous signals into any one of the modulation channels.
Each internal and external modulation source can be simultaneously
enabled to produce combined amplitude and frequency (or phase)
modulation. Pulse modulation can be applied to each of the carriers
from external pulse sources. The pulse modulation can be used in
combination with the other forms of modulation. 2
-
level or 4
-
level FSK
modulation can be applied to each carrier using data from an external
source.
Frequency modulation
Deviation range:
0 to 100 kHz.
Resolution:
3 digits or 1 Hz.
Accuracy:
±
5% of set depth at 1 kHz modulation rate.
Bandwidth (1 dB):
DC to 100 kHz (DC coupled);
10 Hz to 100 kHz (AC coupled);
20 Hz to 100 kHz (AC coupled with ALC).
Group delay:
Less than 5
µ
s to 100 kHz.
Carrier frequency offset:
Less than 1% of the set frequency deviation when DC coupled.
Distortion:
Less than 1% at 1 kHz rate for deviations up to 100 kHz, typically
≤
0.3%
at 1 kHz rate for deviations up to 10 kHz.
(For carrier frequencies below 50 MHz: less than 3% at 1 kHz rate and
deviations up to 100 kHz.)
FSK
Modes:
2
-
level or 4
-
level FSK.
Data source:
External data via rear panel 25
-
way D
-
type connector.
Frequency shift:
Settable up to
±
100 kHz.
