BTC Z22 Manual do Utilizador descarregar pdf (Página 14)

Version 02.00, November 2014

14 Rohde & Schwarz R&S

BTC Broadcast Test Center

Internal baseband characteristics (R&S

BTC-B11 or R&S

BTC-B12 option)

The R&S

BTC-B11 option provides one I/Q path to the RF section (to RF path A) as well as one analog I/Q output (i.e. one I and one

Q output connector). The R&S

BTC-B12 option provides two I/Q paths to the RF section (if two RF paths are installed) as well as two

analog I/Q outputs. With two RF paths, R&S

BTC-B12 is required.

Either R&S

BTC-B11 or R&S

BTC-B12 must be installed on the instrument.

D/A converter

Data rate

200 MHz

Resolution

16 bit

Sampling rate

800 MHz (internal interpolation × 4)

Aliasing filter

with amplitude, group delay and S

correction

Bandwidth, rolloff to –0.1 dB

80 MHz

D/A converter interpolation spectra

up to 10 MHz

< –80 dBc

up to 80 MHz

< –73 dBc

I/Q impairments (digital baseband)

These impairments are set in the digital baseband section of the R&S

BTC. They act

on the I/Q signal sent to the I/Q modulator/RF section, as well as on the I/Q signals at

the analog or digital I/Q outputs (of the respective path).

Carrier leakage

setting range

–10 % to +10 %

resolution

0.01 %

I  Q (imbalance)

setting range

–10 % to +10 %

resolution

0.01 %

Quadrature offset

setting range

–10° to +10°

resolution

0.01°

Differential analog I/Q outputs and digital baseband inputs/outputs

(R&S

BTC-K2500 option)

The R&S

BTC-K2500 option enables the analog I/Q outputs, the differential analog I/Q ouputs and the digital baseband inputs and

ouputs.

Analog I/Q outputs (R&S

BTC-K2500 option)

Number of I/Q outputs

with R&S

BTC-B11 option

with R&S

BTC-B12 option

Output impedance

50 Ω

Output voltage

EMF (output voltage depends on set

modulation signal)

1 V (V

)

Offset

EMF

< 1 mV

Frequency response

at R

= 50 Ω

Magnitude

up to 10 MHz

0.02 dB (meas.)

up to 80 MHz

0.03 dB (meas.)

I/Q balance

at R

= 50 Ω

Magnitude

up to 10 MHz

0.01 dB (meas.)

up to 80 MHz

0.02 dB (meas.)

Spectral purity

at R

= 50 Ω

SFDR (sine)

up to 2 MHz

> 70 dB

up to 20 MHz

60 dB (meas.)

Wideband noise

10 MHz sine wave at 1 MHz offset

–155 dBc (typ.)

Optimization mode = high quality.

Value applies after 1 hour warm-up time and recalibration for 4 hours of operation and temperature variations of less than +5 °C.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 63 64

Comentários a estes Manuais

Sem comentários

BTC Z22 Manual do Utilizador Página 14

Comentários a estes Manuais