GENERAL INFORMATION
1-9
Spectral purity (analog mode)
At RF levels up to +7 dBm in CW and
analog modulation modes:-
Harmonics 2050T,
2051T:
Better than
−
30 dBc for carrier frequencies to 1 GHz;
Better than
−
27 dBc for carrier frequencies from 1 GHz to 1.35 GHz.
Better than
−
27 dBc for carrier frequencies above 1.35 GHz.
2052T:
Better than
−
30 dBc for carrier frequencies to 1 GHz;
Better than
−
27 dBc for carrier frequencies from 1 GHz to 1.35 GHz.
Better than
−
25 dBc for carrier frequencies above 1.35 GHz.
Sub-harmonics
Better than
−
90 dBc to 1.35 GHz.
Better than
−
40 dBc to 2.3 GHz.
Better than
−
30 dBc to 5.4 GHz.
Non-harmonics
Better than
−
70 dBc at offsets from the carrier frequency of 3 kHz or
greater.
Residual FM (FM off)
Less than 7 Hz RMS deviation in a 300 Hz to 3.4 kHz unweighted
bandwidth at 470 MHz.
SSB phase noise
Less than
−
116 dBc/Hz (typically
−
122 dBc/Hz) at an offset of 20 kHz
from a carrier frequency of 470 MHz.
RF leakage
Less than 0.5
μ
V PD generated at the carrier frequency across a
50
Ω
load by a two-turn 25 mm loop, 25 mm or more from any part of
the case.
FM on AM
Typically less than 100 Hz for 30% AM depth at a modulation
frequency of 1 kHz and a carrier frequency of 500 MHz.
φ
M on AM
Typically less than 0.1 radian at a carrier frequency of 500 MHz for
30% AM depth for modulation rates up to 10 kHz.
Spectral purity (digital and vector
modes)
In digital and vector modes of
operation:
Modulation is generated by converting a 120, 132, 160 or 176 MHz
intermediate frequency (IF) to the required carrier frequency.
Additional signals are present at the local oscillator frequency, image
frequency and frequencies equivalent to the harmonics of the IF
mixed with the local oscillator.
Phase noise:
In vector mode: As analog modulation and CW modes.
In digital mode: As analog modulation modes for offsets >100 kHz;
better than
−
108 dBc/Hz at 20 kHz offset from a 1 GHz carrier.
Modulation modes
Seven modulation modes are available:
Single
FM, Wideband FM,
Φ
M, AM or pulse (optional).
Dual
Two independent channels of differing modulation type (e.g. AM with
FM).
Composite
Two independent channels of the same modulation type. (e.g. FM1
with FM2).
Dual composite
A combination of Dual and Composite modes providing four
independent channels (e.g. AM1 with AM2 and FM1 with FM2).
Vector
Provides IQ modulation facility.
Digital
Accepts digital inputs and converts the signal to QAM, PSK, FSK or
GMSK formats.
Advanced digital
Accepts digital inputs and converts the signal to accurate TETRA
modulation with low levels of adjacent channel power.