| Audio (I2S, LJ, RJ, TDM) triggering and decoding |
| Bus configuration |
source (data, clock, word/sync) |
| R&S RTA4004 |
channel 1, channel 2, channel 3, channel 4, logic channels from D15 to D0 (with R&S RTA-B1 option) |
| thresholds |
per-channel threshold (analog channels), per-group threshold (logic channels), assisted threshold configuration (find level) |
| bit rate |
up to 30 Mbps |
| signal type |
I2S standard, left justified, right justified, TDM |
| polarity |
data: active high, active low; clock: rising edge, falling edge; word/sync: normal, inverted |
| word length |
2 bit to 32 bit |
| bit order |
most significant bit first (MSBF), least significant bit first (LSBF) |
| I2S-specific setup |
| first channel |
left, right |
| LJ/RJ-specific setup |
| first channel |
left, right |
| channel offset |
0 to 31 bit |
| TDM-specific setup |
| number of channels |
1 to 8 |
| channel length |
2 bit to 32 bit |
| channel offset |
0 to (channel length – word length) bits |
| channel delay |
0 to 31 bit |
| Trigger |
trigger events |
data, window, word/sync, error condition |
| data setup |
define individual value and condition for each audio channel; condition =, ≠, >, <, inside range, outside range, don’t care; trigger when “all” or “any” audio channel conditions are met in single audio frame |
| window setup |
audio channel setup same as data setup; user-defined window length up to 4 000 000 000 frames |
| word/sync setup |
rising edge, falling edge |
| Decode |
displayed signals |
bus signal, stacked bus signal, logic signal |
| color coding of bus signal |
color-coded audio channels |
| displayed format of data |
hex, signed decimal, binary, ASCII |
| frame table |
decode results displayed as tabulated list with timestamp; frame navigation; data export as CSV file |
| track of audio waveform |
displays audio channel content as a waveform that is time-correlated to the source signals; user can activate, scale and position each audio channel individually |