Specifications for Signal Personality Characteristics
Custom modulation
Custom digitally modulated signals
Modulation | QPSK | π/4DQPSK | 16QAM | 2FSK | GMSK | |||||
Filter |
|
| Root Nyquist |
|
|
| Gaussian |
| ||
Filter factor [a or BbT] | 0.25 | 0.25 | 0.25 |
| 0.5 |
| 0.5 | |||
Modulation index | N/A | N/A | N/A |
| 0.5 |
| N/A | |||
Symbol rate [Msym/s] |
| 4 |
| 4 |
| 4 |
| 1 |
| 1 |
|
| Error vector magnitude3, 4 |
| Shift error3, 4 | Global phase error3, 4 | |||||
|
|
| [% rms] |
|
| [% rms] | [degrees rms] | |||
fc = 1 GHz | 1.1 | (0.7) | 1.1 | (0.7) | 1.0 | (0.6) | 1.3 | (0.8) | 0.4 | (0.2) |
fc = 2 GHz | 1.2 | (0.8) | 1.2 | (0.8) | 1.0 | (0.6) | 1.4 | (0.9) | 0.5 | (0.3) |
fc = 3 GHz | 1.6 | (1.0) | 1.6 | (1.0) | 1.5 | (0.9) | 1.8 | (1.0) | 0.7 | (0.4) |
fc = 4 GHz | 2.5 | (1.4) | 2.5 | (1.3) | 3.3 | (1.9) | 3.3 | (2.0) | 1.0 | (0.6) |
fc = 5 GHz | 1.5 | (1.0) | 1.5 | (1.0) | 1.2 | (0.8) | 1.8 | (1.2) | 0.6 | (0.3) |
fc = 6 GHz | 1.8 | (1.2) | 1.8 | (1.2) | 1.4 | (1.0) | 2.0 | (1.4) | 0.8 | (0.4) |
Internal modulation using
| NADC | PDC | PHS | TETRA4 | DECT | GSM DCS, PCS | EDGE | |||||
Error vector magnitude6, 4 [% rms] |
|
|
|
|
|
|
|
|
|
|
|
|
Low EVM mode | 1.2 (0.7) | 1.2 (0.7) | 0.9 (0.5) | 0.8 (0.5) |
|
|
| 1.2 (0.6) | ||||
Low ACP mode | (1.2) | (0.9) | (0.6) | (1.0) |
|
|
|
| ||||
Global phase error2 |
|
|
|
|
|
|
|
|
|
|
|
|
rms | N/A | N/A | N/A | N/A | N/A | 0.6 (0.3) | N/A | |||||
pk |
|
|
|
|
|
|
|
|
| 1.9 (1.0) |
| |
Deviation accuracy2 [kHz, rms] | N/A | N/A | N/A | N/A | 2.5 (1.1) | N/A | N/A | |||||
Channel spacing [kHz] |
| 30 |
| 25 |
| 300 | 25 |
| 1728 |
| 200 | 200 |
Adjacent channel power2 [ACP] | Cont. | Burst | Cont. | Burst | Cont. | Burst | Cont. | Burst | N/A | Cont. | Burst | N/A |
(Low ACP mode, dBc) |
|
|
|
|
|
|
|
|
|
|
|
|
at adjacent channel 7 | – | – | – | – |
|
| ||||||
at 1st alternate channel 7 |
|
| ||||||||||
at 2nd alternate channel 7 | – | – |
|
| ||||||||
at 3rd alternate channel7 | – | – |
|
| ||||||||
Support burst types | Custom | Custom | Custom | Custom | Custom | Custom, normal |
| |||||
| up/down TCH | up/down TCH | TCH, sync | up control 1 & 2, | dummy B 1 & 2, | Fcorr, sync, |
| |||||
|
|
| up Vox |
|
| up normal, | traffic B, | dummy, access |
| |||
|
|
|
|
|
|
| down normal, | low capacity |
|
|
| |
Scramble capability |
|
|
|
|
| Yes | Yes |
|
|
|
|
|
1.This level of performance can be attained using the external I/Q inputs, provided the quality of the baseband signal meets or exceeds that of the ESG baseband generator.
2.Parentheses denote typical performance.
3.Specifications apply at power levels ≤ +4 dBm [≤ +5 dBm for Option 506, and ≤ +8 dBm for Option UNB] with default scale factor of I/Q outputs.
4.Valid after executing I/Q calibration and maintained within +/- 5 °C of the calibration temperature.
5.ACP for TETRA is measured over a 25 kHz bandwidth, with an 18 kHz root raised cosine filter. Low ACP mode is valid at power levels ≤
6.Specifications apply for the symbol rates, filter, filter factors [a or BbT] and default scaling factor specified for each standard, and at power levels ≤ +7 dBm [≤ +10 dBm for Option UNB].
7.The “channel spacing” determines the offset size of the adjacent and alternate channels: Adjacent channel offset = 1 x channel spacing, 1st alternate channel = 2 x channel spacing, 2nd alternate channel = 3 x channel spacing, etc.
25
