Datasheet
159
Triax distribution amplifiers
Type
Part No.
HEF 845
323068
HEF 845 C
323071
HEF 845 CL
323074
Frequency range
selected: VHF I “on”, RP “off”
selected: VHF I “off”, RP “on”
MHz
MHz
40-862 40-862
5-65/85-862
40-862
5-65/85-862
Gain forward
Gain @ 862 MHz
Attenuator at input (2 dB steps)
Attenuator elements interstage
dB
dB
dB
36
0-20 (pot)
0/6
36
0-16
0/6
36
0-16
0/6
Gain return path
Gain @ 60 MHz
Attenuator elements at input
Attenuator elements at output
dB
dB
dB
-1.5/27
0/2/4/6/50
0/3/6/9
-1.5/27
0/2/4/6/50
0/3/6/9
Amplitude response forward
40...862 MHz (VHF I: on)
Line equalizer at input
Line equalizer (2...3 dB steps)
Slope interstage
dB
dB
dB
dB
0-18 (pot)
0/7
1.5
0-16
0/7
1.5
0-16
0/7
Amplitude response return path 5...60 MHz
Equalizer element interstage
dB
dB
1.5
0/3/6
1.5
0/3/6
Random noise
Forward (VHF I „on“)
Return path (VHF I „off“)
dB
dB
5.0 5.5
6.0
5.5
6.0
Return loss @ 40 MHz, -1.5 dB/octave dB > 14 > 14 > 14
Output level forward
IMR2/ IMR3 ≥ 60 dB
CSO ≥ 60 dB,
42 ch. Slope 0/7 dB
CTB
≥ 60 dB,
42 ch. Slope 0/7 dB
dBµV
dBµV
dBµV
114/123
109/111
108/110
114/123
109/111
108/110
114/123
109/108
111/110
Output level return path
IMR2/ IMR3 ≥ 60 dB dBµV 104/115 104/115
RF connectors (75 Ohm)
Input
Output
Test point input: bi-directional
Test point output: directional
dB
dB
F-female
F-female
-20 (bi-dir)
F-female
F-female
-20
-20
F-female
F-female
-20
-20
Operating conditions
Max. RF level (EMC) dBµV 113 113 113
Supply voltage V 180-253 180-253 25-65
Power consumption W 6.5 9 9
Operating temperature °C -25...+55 -25...+55 -25...+55
Protection class II, Protective II, Protective II, Protective
Housing protection degree IP 65 65 65
Dimensions W x H x D mm 190 x 110 x 80 190 x 110 x 80 190 x 110 x 80
Weight kg 2 2 2
Packing unit 1 pcs. carton box 1 pcs. carton box 1 pcs. carton box
Reference standards
Product standards/safety/EMC
RoHS 2002/95/EG compliant
EN 50083-3 - Class 2 / EN 50083-1; EN 60065 / EN 50083-2
Yes
Technical data on
HEF series
HEF amplifiers – Reliable, flexible and cost-efficient for big multi-dwelling houses
• ROB – “Return Path on Board” without any external modules or pads means more
flexibility and lower efforts in installation and logistics
• Jumper matrixes to switch the fix elements for attenuation / equalization and to select
return path or VHF I operation increase the reliability and reduce the logistics
• High gain at the return path meets also special requirements in multimedia networks
• Excellent electrical performance for low cost and low power consumption
• For SMATV HEF 845 without return path and with spin potentiometers instead of
jumper matrixes
HEF amplifier housing