Atec Rohde-Schwarz-UPV - Manual (Page 13)

Version 03.00, August 2011
Rohde & Schwarz R&S ® UPV Audio Analyzer 13
PDM bitstream analyzer (R&S ® UPV-K421 option)
Universal serial interface (R&S ® UPV-B42 option) required.
Interface format
Connector
26-pin connector strip, 2.54 mm (female)
Input data lines 4
channel mode: mono 1 to 4 mono channels (data lines 1 to 4) Input measurement channels
channel mode: stereo 1 to 2 stereo channels (data lines 1 and 2)
channel mode: mono rising, falling Data alignment
(relative to bitstream clock)
channel mode: stereo ch1 rising/ch2 falling
ch1 falling/ch2 rising
ch1 high/ch2 low
ch1 low/ch2 high
Downsampling factor 16/32/64/128/256
Audio bits 8 to 32
internal channel mode mono or stereo Clock source
external channel mode mono only
Clocks
Bitstream clock frequency
internal, external 512 kHz to 12.800 MHz
internal clock 40 % to 60 % adjustable Bitstream clock duty cycle
external clock 40 % to 60 %
Sampling frequency depends on bitstream clock frequency and
downsampling factor 2 kHz to 200 kHz
Timing
Sampling delay
–9.323 ns to +9.323 ns
setup time –1.3 ns Data to bitstream clock
(relative to bitstream clock)
hold time 4.6 ns
Measurement functions same as for digital audio analyzer
Output (clock)
CMOS 0.9 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V Logic voltage
LVTTL 3.3 V
Impedance short-circuit-proof 50 Ω
Maximum reverse voltage –3 V to selected logic voltage + 3 V
Inputs (data and clock)
CMOS 0.9 V/1.2 V/1.5 V/1.8 V/2.5 V Logic voltage
LVTTL 3.3 V
–0.3 V to selected logic voltage + 0.3 V 10 kΩ Impedance
–4 V to –0.3 V or selected logic voltage +
0.3 V to selected logic voltage + 4 V 100 Ω
Maximum input voltage –4 V to selected logic voltage + 4 V