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Upstream Spectrum capture summary
Last Updated: July 07, 2026

This section provides a summary of different Upstream Spectrum Capture modes, capture controls available on the UI, and capture concurrency and frequency limits for all the devices supporting Upstream Spectrum capture.

Upstream Spectrum capture comparison compares modes and capture controls on the ServAssure NXT UI per CMTS or DAA device.
The columns in this table are:
  • Device: Device selected in the Upstream Spectrum Analyzer. Supported devices include:
    • CommScope E6000® Converged Edge Router (E6000 CER CMTS)
    • Casa CMTS
    • Cisco CMTS
    • CommScope RD1 Series Remote PHY Device (RD1 Series RPD)
    • CommScope RD3 Series RD2322 RPD (RD2322 RPD)
    • CommScope RD3 Series RD2322 RMD (RD2322 RMD)
    • CommScope RD4 Series RD1424-M4 RPD (RD1424-M4 RPD)
    • Harmonic Pebble Remote DAA Device (Harmonic Pebble RPD)
  • Capture mode: Supported mode for a Upstream Spectrum capture.
    NOTE: Static Pseudowire capture mode requires ServAssure Collection Platform 2.11 or higher.
  • Capture controls: Supported controls to perform the Upstream Spectrum capture. This column lists the controls that are available in the UI for a given device and mode selection.
  • Concurrency: Supported number of Upstream Spectrum capture tests that can be performed on a device.
  • Channel type: Supported channels per device and capture mode. They can be SCQAM or OFDMA.
  • Notes: This column lists any important notes with respect to the other columns.
Table 1. Upstream Spectrum capture comparison

Information in this table is organized by device type and then capture mode. For information about tested and recommended software versions per device, refer to Upstream Spectrum analysis compatibility and about descriptions of capture controls, refer to Capture tab

DeviceCapture modeCapture controlsConcurrencyChannel typeNotes
E6000 CER CMTSCompatibility

Analysis

Type

IUC

Service Identifier-

  • IdleFFT

  • IdleICB

  • Any

Domain

Sample Count

Capture Interval

One capture per card

SCQAM

E6000 CER CMTS

Standard

Start Frequency

End Frequency

Samples

Service Identifier-

  • IdleFFT

  • Any

Capture Interval

One capture per card

SCQAM/OFDMA
Casa CMTS

Standard

Service Identifier-

  • IdleFFT

  • Any

Capture Interval

One capture per upstream port and up to the maximum limit configured on the CMTS

SCQAM/OFDMA
Cisco CMTS1

Standard

Start Frequency

End Frequency

Service Identifier-

  • Any

Capture Interval

One capture per upstream port and up to the maximum limit configured on the CMTS

SCQAM/OFDMA

Capture interval: Up to 4s

RD1 Series RPD

Standard

Static Pseudowire

Start Frequency

End Frequency

Samples

Service Identifier-

  • IdleFFT

  • Any

Capture Interval

One capture per RPD

SCQAM/OFDMA

Capture Interval not applicable: Static Pseudowire mode/IdleFFT

Service Identifier- IdleFFT: supported only in Standard mode

RD2322 RPD

Standard

Static Pseudowire

Start Frequency

End Frequency

Samples

Service Identifier-

  • IdleFFT

  • Any

Capture Interval

One capture per RPD

SCQAM/OFDMA

Capture Interval not applicable: Static Pseudowire mode/IdleFFT

Service Identifier- IdleFFT: supported only in Standard mode

RD2322 RMD

Static Pseudowire

Start Frequency

End Frequency

Samples

Service Identifier-

  • IdleFFT

  • Any

Capture Interval

One capture per upstream port

SCQAM/OFDMA

Capture Interval not applicable: IdleFFT

RD1424-M4 RPD

Standard

Static Pseudowire

Start Frequency

End Frequency

Samples

Service Identifier-

  • IdleFFT

  • Any

Capture Interval

One capture per RPD

SCQAM/OFDMA

Capture Interval not applicable: Static Pseudowire mode/IdleFFT

Service Identifier- IdleFFT: supported only in Standard mode

Harmonic Pebble RPD

Static Pseudowire

Start Frequency

End Frequency

Samples

Service Identifier-

  • Any

Capture Interval

One capture per RPD

SCQAM/OFDMA

Upstream Spectrum capture frequency span provides frequency limit or range for every channel per CMTS or DAA device.

Table 2. Upstream Spectrum capture frequency spanInformation in this table is organized by device type and then channel.
DeviceFFT/Trigger modeChannelFrequency limit in MHz
E6000 CER CMTS

IdleFFT

SCQAM (narrowband)

80

OFDMA (wideband)

320

Any

SCQAM (wideband)

320

OFDMA (wideband)

320

Cisco CMTS

Any

SCQAM (wideband)

204

OFDMA (wideband)

204

RD1 Series RPD

IdleFFT

SCQAM (narrowband)

80

OFDMA (wideband)

320

Any

SCQAM (wideband)

320

OFDMA (wideband)

320

RD2322 RPD

IdleFFT

SCQAM (narrowband)

80

OFDMA (wideband)

320

Any

SCQAM (wideband)

320

OFDMA (wideband)

320

RD2322 RMD

IdleFFT

SCQAM (narrowband)

80

OFDMA (wideband)

320

Any

SCQAM (wideband)

320

OFDMA (wideband)

320

RD1424-M4 RPD

IdleFFT

SCQAM (narrowband)

80

OFDMA (wideband)

320

Any

SCQAM (wideband)

320

OFDMA (wideband)

320

Harmonic Pebble RPD

Any

SCQAM (wideband)

409.6

OFDMA (wideband)

409.6

NOTE: Channel is related only to the FFT Spectrum Analysis Circuits (SAC) and the frequency limitation is set per device vendor (not controlled by ServAssure NXT).

For more information, refer to RD2322 RMD User Guide and Proactive Network Maintenance chapter in the E6000 CER I-CCAP User Guide.