Tektronix RFM150, Instruction Manual

Page: 126 / 278

Specifications
4–2 RFM 150 Instruction Manual
Electrical Specification
Table 4–1: Input signal requirements
Name Description
Frequency Range REQ: 5 MHz
1
to 1080 MHz
REF: Use a precision 75
W
connector.
Amplitude Range REQ: –35 dBmV to +60 dBmV
(+25 dBuV to +120 dBuV)
Maximum Input Power REQ: +68 dBmV
REF: Total input power sum of all channels.
Table 4–2: Measurement accuracy
Name Description
Carrier Amplitude REQ:
±
1 dB –20 dBmV to +60 dBmV. Visual carrier-to-
noise
≥
25 dB.
1, 2, 3
±
1.5 dB –35 dBmV to – 20 dBmV. Visual
carrier-to-noise
≥
25 dB.
1, 2
REF: Carrier amplitude is the rms voltage of a
channel’s visual carrier at the peak of the
modulation envelope, measured across a
termination impedance that matches the
internal impedance of the cable system.
1
Amplitude accuracy specification below 20 MHz is typical.
2
To meet measurement accuracy specifications, the system visual carrier
amplitude variation must be less than 10 dB over 300 MHz plus 1 dB for each
additional 100 MHz up to 17 dB total.
3
For input signals > 50 dBmV and > 500 MHz, the input must be disconnected
during self calibration.
Specifications
4–2 RFM 150 Instruction Manual
Electrical Specification
Table 4–1: Input signal requirements
Name Description
Frequency Range REQ: 5 MHz
1
to 1080 MHz
REF: Use a precision 75
W
connector.
Amplitude Range REQ: –35 dBmV to +60 dBmV
(+25 dBuV to +120 dBuV)
Maximum Input Power REQ: +68 dBmV
REF: Total input power sum of all channels.
Table 4–2: Measurement accuracy
Name Description
Carrier Amplitude REQ:
±
1 dB –20 dBmV to +60 dBmV. Visual carrier-to-
noise
≥
25 dB.
1, 2, 3
±
1.5 dB –35 dBmV to – 20 dBmV. Visual
carrier-to-noise
≥
25 dB.
1, 2
REF: Carrier amplitude is the rms voltage of a
channel’s visual carrier at the peak of the
modulation envelope, measured across a
termination impedance that matches the
internal impedance of the cable system.
1
Amplitude accuracy specification below 20 MHz is typical.
2
To meet measurement accuracy specifications, the system visual carrier
amplitude variation must be less than 10 dB over 300 MHz plus 1 dB for each
additional 100 MHz up to 17 dB total.
3
For input signals > 50 dBmV and > 500 MHz, the input must be disconnected
during self calibration.