IBDH(A) series
Single-Range, Single & Multi-Channel, Rack Mount, Block Down Converters
with full user interface & remote control

The 19-inch 1U rack mounted IBDH(A) series of block frequency down converter units from Peak Communications aredesigned to take the incoming SHF signal and produce an output at L-Band that is suitable for direct connection to an Lband demodulator or for further conversion typically by a P7001 synthesised down converter.
The IBDH(A) series of units are mains powered and are constructed of high-grade components to give the ultimate
performance. They utilise externally phase locked dielectric resonator oscillators (XPDROs) and are far superior in stability
and phase noise to voltage-controlled oscillators (VCOs), as commonly used in other BDC designs.
High rejection performance filtering techniques are employed to ensure unrivalled spurious response.
For redundancy the IBDH(A) uses a simple CANBUS® interface and has an integral redundancy controller for 1+1 & 2+1
operation (for use with external R1000HH, R2000HH series switch units), also compatible with the RCUH100/ RCUH200
series 1+1/ 2+1 ‘stand-alone’ redundancy controllers. For N+1 systems the RCU1002 series is offered.
These converters use a single-stage topology apart from the IBDH340, which is dual-stage. The unit incorporates a graphics
display module, membrane keyboard and features a clear and intuitive control and configuration menu fully utilising the uniquegraphics display.

The unit has a highly stable internal reference source and will automatically detect and lock to an
external 10MHz signal, when applied.

Peak Features
High stability, low ripple and excellent phase noise, using PDRO technology
10MHz external reference fitted as standard with automatic internal reference back-up
Electronically variable attenuator option for both local & remote control of gain
Integral 1+1 & 2+1 CANBUS® redundancy control & N+1 switch systems available
L-Band monitor and fibre optic L-Band interface options available
Available in dual, triple & quad-channel versions

High grade, single & multi-channel block down converter products;
BDC Model

SHF Input Frequency (GHz)L-Band Output Frequency (MHz)

Traditional receive band coverage;
2.0-2.5 (S-Band)
950-1450
IBDH250
3.7-4.2 (C-Band)
950-1450
IBDH370950-1750
IBDH340, IBDH342(dual), IBDH344 (quad) 3.4-4.2 (full C-Band)
1750-950 (inverted spectrum)
IBDH420, IBDH422(dual), IBDH424 (quad) 3.4-4.2 (full C-Band)
950-1250
IBDH450, IBDH452(dual), IBDH454 (quad) 4.5-4.8 (INSAT C-Band)
7.25-7.75 (X-Band)
950-1450
IBDH725
10.7-11.7 (low Ku-Band)
950-1950
IBDH1070
950-1700
IBDH1095
10.95-11.70 (mid Ku-Band)11.2-11.7 (mid Ku-Band)
950-1450
IBDH1120
11.45-12.20 (mid Ku-Band)
950-1700
IBDH1145
11.7-12.2 (mid Ku-Band)
950-1450
IBDH1170
11.70-12.75 (mid Ku-Band)
950-2000
IBDH117112.25-12.75 (mid Ku-Band)
950-1450
IBDH1225
Transmit band coverage for ground test & ranging applications (consult factory with any specific filtering requirements);
5.850-6.425 (C-Band)
950-1525
IBDH600
5.85-6.65 (extended C-Band)
950-1750
IBDH665
7.9-8.4 (X-Band)
950-1450
IBDH790
12.75-13.75 (low Ku-Band)
950-1950
IBDH1275
14.0-14.5 (Ku-Band)
950-1450
IBDH140
13.75-14.50 (extended Ku-Band)
950-1700
IBDH137
13.75-14.80 (super extended Ku-Band)
950-2000
IBDH14817.30-18.40 (Full DBS-Band)
950-1850
IBDH184
For other ‘non-standard’ frequency requirements or multi-channel units (dual, triple & quad units), please contact the factory.
For multiple-range block down converters covering wider bandwidths please see IBDH(B) series datasheet.
For equivalent lower cost BDC units without the full user interface please see IBD(A) series datasheet.
For Ka-Band block down converters please see IBDH(Ka) series datasheet.
For equivalent remote mount units, please see PBD(A) series datasheet.

Rear panel view (sample)

Peak Communications reserves the right to alter the specifications of this equipment without prior notice. IBDH(A)series-070322.
Peak Communications Ltd., Unit 1, The Woodvale Centre, Woodvale Road, Brighouse, West Yorkshire, HD6 4AB, U.K.
Tel; +44 (0)1484 714200 Sales; +44 (0)1484 714229 Fax; +44 (0)1484 723666 Email; sales@peakcom.co.uk Web; www.peakcom.co.uk

IBDH(A) series - Typical Specification
SHF Input
Connector
Option 1a;

SMA (f), 50Ω
N-Type (f), 50Ω

Note; for multi-channel version, multiple connectors are provided.

Return loss>18dB (>15dB for S-Band)

L-Band Output
Frequency
Spectrum sense
Connector
Option 1b;
Option 1c;
Option 3;

950 up to 2000MHz, depending on model
Non-inverting, apart from IBDH420
SMA (f), 50Ω
N-Type (f), 50Ω
BNC (f), 50Ω
BNC (f), 75Ω

Note; for multi-channel version, multiple connectors are provided.

Return loss
1dB GCP
Option 5b;>15dB+8dBm+16dBmTypical RF Performance
LO phase noise-55dBc/Hz at 10Hz
(typical with good
-75dBc/Hz at 100Hz
phase noise-92dBc/Hz at 1kHz
ext. 10MHz ref)-100dBc/Hz at 10kHz-105dBc/Hz at 100kHz-125dBc/Hz at 1MHz
Harmonics
Better than -50dBc
Spurious<-80dBm (in-band, non-carrier related),
Note; IBDH250 specified as <-70dBm.

<-75dBc (in-band, carrier related)
Note; C-Band units specified as <-65dBc at input -40dBm.

LO leakage<-80dBm (always out of band)

Note; IBDH250 specified as <-70dBm (in band).

3rd order intercept
Channel isolation>+18dBm-65dBc (for multi-channel versions only)

Transfer Characteristics
Conversion gain
30dB ±1dB at band centre
Option 4b;
40dB ±1dB at band centre
Gain stability±0.5dB from 0 to 50°C
Gain flatness±1dB full band (±1.5dB for bandwidths ≥800MHz)±0.5dB across any 40MHz in-band
LO frequency
dependant on model
LO, L-Band & SHF Monitor (Option 2)
Front or rear panel mountedConnector
50Ω, SMA (f)Note; other connector styles available, please consult the factory

Level -20dBc ±3dB (-10dBm nominal for LO monitor)
Electronically Variable L-Band Attenuation (Option 10)
Attenuation range
30dB nominal
Step size
Option 10a;0.5dB
Option 10b;0.1dBControl
Local & remote

L-Band Linear Slope compensation (Option 15, 15b)
Compensates for internal circuitry & external primarily cross-site cables.
Note; unit options chosen will determine ‘surplus’ available for external compensation(for details contact factory).

Frequency
Passive (Option 15);
Active (Option 15b);950-2150MHz
5dB nom., fixed positive compensation
0.01dB/MHz nom., settable positive compensation

Note; attenuator (option 10a/10b) nominal dynamic range is reduced according tothe following table for narrower L-Band frequency ranges
Fmax. (MHz)
Attenuator range for option 10a/ 10b (dB)
2150
30
1950
28
1700
25.51450
23

External Reference Input (with automatic detection)
Frequency
10MHz (5MHz factory settable)
Connector
BNC (f), 50Ω
Level0dBm ±5dB
Required phase noise better than 50dBc/Hz of output Phase Noise
Locking delay<2 minutes to stabilise from cold
Internal Back-up Reference Stability
Allan deviation
5 x 10-11 over 1s
Ageing<5 x 10-9 per day, <5 x 10-7 per year
Temp stability<5 x 10-8 over 0 to 500C
High stability (Option 8)
Allan deviation
3 x 10-12 over 1sAgeing<2 x 10-10 per day, <2 x 10-8 per year
Temp stability<3 x 10-9 over 0 to 500C
MechanicalWidthHeightDepth

19” standard rack mountable
1U (1.75”)~400mm (15.7”), plus connectors

Note; for multi-channel versions, a longer ~534mm (21”) chassis may be provided,
depending upon options selected.

Construction
WeightAluminium chassis
4-6kgs (9-13lbs) approx., unit and option dependent

Environmental
Operating temp
EMC
Safety0°C to +50°C
EN 55022, part B & EN 50082-1
EN 60950

Power Supply
Voltage90-264VACFrequency
47-63HzPower
50 Watts max.
Option 7;
Redundant PSU; provides a 1+1 redundant PSU
configuration with separate prime power inputs
Control System Interface
Remote control
RS232/ 485 port
Option 9;
Ethernet; embedded web server & SNMP
network management support
Redundancy
CANBUS® interface for N+1 system
In-built 1+1 & 2+1 controller
Discrete ‘alarms
LO lock failure
interface’
PSU failure

Options1a) N-Type (f) SHF interface connection1b) N-Type (f) L-Band interface connection
1c) BNC (f) L-Band interface connection2a) -20dBc L-band monitor on rear panel (SMA)2b) -20dBc L-band monitor on front panel (SMA)2c) -20dBc SHF monitor on rear panel (SMA)2d) -20dBc SHF monitor on front panel (SMA)2e) -10dBm nominal LO monitor on rear panel (SMA)2f) -10dBm nominal LO monitor on front panel (SMA)
3)
75Ω interface at L-band (6dB gain loss)4b) 10dB increase in gain to 40dB5b) 1dB GCP increase to +16dBm (includes extra 10dB gain)
6)
Fibre optic L-band interface connection
7)
Redundant power supply
8)High stability internal reference option
9)
Ethernet interface with embedded web server & SNMP
10a) Attenuator with local & remote control, 30dB stepped 0.5dB
10b) Attenuator with local & remote control, 30dB stepped 0.1dB
15) 5dB passive, fixed, slope compensation
15b) 2-8dB active, user settable, slope compensation
Notes; the addition of options can modify the typical specification, for details please consult the factory.

Peak Communications reserves the right to alter the specifications of this equipment without prior notice. IBDH(A)series-070322.
Peak Communications Ltd., Unit 1, The Woodvale Centre, Woodvale Road, Brighouse, West Yorkshire, HD6 4AB, U.K.
Tel; +44 (0)1484 714200 Sales; +44 (0)1484 714229 Fax; +44 (0)1484 723666 Email; sales@peakcom.co.uk Web; www.peakcom.co.uk