User`s guide

System Speciﬁcations

0.3 GMSK Modulation Speciﬁcations

0.3 GMSK Modulation Specifications

After one timeslot, 577 µs, from an isolated RF generator trigger in the GSM

frequency bands.

Error

Phase error: ≤ 1˚ rms

Peak phase error: ≤ 4˚ peak

Frequency error (880 to 960 MHz): ± [0.02 ppm (18 Hz) + reference

accuracy], for normal bursts

Typically ± [0.03 ppm (27 Hz) +

reference accuracy], for RACHs

Frequency error (1880 to 1990 MHz): ± [0.01 ppm (22 Hz) + reference

accuracy], for normal bursts

Typically ± [0.02 ppm (32 Hz) +

reference accuracy], for RACHs

Amplitude ﬂatness: ± 0.25 dB peak

Clock input Frequency

(Agilent 8922M only):

270.833 kHz ± 2 Hz (relative to

reference)

Level: TTL

Data Input Format (Agilent 8922M

only):

Non differentially encoded input

Level: TTL

Supplemental characteristics

After three timeslots, 1.73 ms, from an isolated RF generator trigger in the GSM

frequency bands

Phase error:

≤ 0.5˚ rms

Peak phase error: ≤ 2.0˚ peak

Frequency error (880 to 960 MHz): ± [0.01 ppm (9 Hz) + reference accuracy]

for normal bursts

Typically ± [0.02 ppm (18 Hz) +

reference accuracy] for RACH bursts

Frequency error (1880 to 1990 MHz): ± [0.005 ppm (9 Hz) + reference

accuracy] for normal bursts

Typically ± [0.01 ppm (18 Hz) +

reference accuracy] for RACH bursts

1. GSM frequency bands are 880 to 915 MHz and 925 to 960 MHz.