Data Sheet
Page 3 of 8
Table 2. Electrical Specifications
Electrical Units Long Reach &
Extended Reach
Broadcast Tx
High-Density
Forward QAM Tx
Reverse Tx Notes
Bandwidth MHz 45-1002 550-1002 5-200
Broadcast (BC) RF Input
Required nominal RF Input Level per Ch:
40 NTSC ch’s (Low or High)
78 NTSC analog ch’s with:
-200 MHz QAM (550-750 MHz) @ -6 dB
-450 MHz QAM (550-1000 MHz) @ -6 dB
64 PAL B/G analog ch’s with:
-150 MHz QAM (600-750 MHz) @ -6 dB
-400 MHz QAM (600-1000 MHz) @ -6 dB
59 PAL D/K analog ch’s with:
-150 MHz QAM (600-750 MHz) @ -6 dB
-400 MHz QAM (600-1000 MHz) @ -6 dB
16 QAM ch’s
dBmV
dBmV
dBmV
dBmV
dBmV
dBmV
dBmV
dBmV
23
19.5
19.0
20.5
20.0
21.0
20.5
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
+22.0 ± 1.5
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1
1
1
1
1
1
1
2,3
Narrowcast (NC) RF Input
Required RF Input Level per Ch (QAM):
-for QAM @ -6dBc relative to analog ch’s
Required RF Input Level per Ch (analog):
-for equal amplitude analog ch’s (BC & NC)
dB
dB
+6
+12
(above Broadcast
RF analog level)
N/A
N/A
N/A
N/A
Reverse RF Input dBmV/Hz - - -39 to -55 4
Front Panel RF Test Point
●
Relative to Input
dB
dB
Broadcast Input
-20 ± 0.5
Narrowcast Input
-32 ± 0.5
Broadcast Input
-20 ± 1.0
-20 ± 1.0
RF Input Return Loss dB 16 16 16
Frequency Response
●
5 MHz - 200 MHz
●
45 MHz - 550 MHz
●
45 MHz - 1002 MHz
dB
dB
dB
N/A
± 0.50
± 0.75
N/A
N/A
± 0.75
± 0.75
N/A
N/A
Power Consumption (maximum) W DC 45 7.5 15
Notes:
1. RF input levels specified are with Tx AGC off.
2. For the High Density Forward QAM Tx with 16 QAM channels,-8 dBm input to the receiver, and -6 dB RF Δ between the broadcast and
narrowcast (QAM) signal.
3. For the Forward QAM Tx or High Density QAM Tx, as used in 8 wavelength DWDM narrowcast network HE ⇒ HUB architecture.
4. RF drive level range to achieve a 42 dB Noise Power Ratio (NPR) with 40km of fiber and 35 MHz noise loading.
Unless otherwise noted, specifications are based on measurements made in accordance with NCTA Practices for Measurements made on Cable
Television Systems using standard frequency assignments and are referenced to the ambient air temperature at the inlet to the Prisma II chassis.