R&S®THR9 Liquid-Cooled FM Transmitter Family

Highest efficiency, smallest footprint

Key Facts

  • Energy efficiency of up to 75 %
  • Maximum robustness and extremely low service costs thanks to redundant liquid cooling system
  • Small footprint through integration of multiple transmitters and highest power density

Brief Description

The R&S®THR9 high-power FM transmitter family makes terrestrial broadcasting of audio broadcast signals extremely efficient and also saves space.

Specifications

Standards FM, HD Radio; other standards on request
RF output 1 5/8" EIA, 3 1/8" EIA

Key Facts

  • Energy efficiency of up to 75 %
  • Maximum robustness and extremely low service costs thanks to redundant liquid cooling system
  • Small footprint through integration of multiple transmitters and highest power density
  • FM and HD Radio™ transmitters for band II

The R&S®THR9 contains open source software packages. Copies of the respective licenses are included in the Open Source Acknowledgement, see Downloads/Software area of this web page.

Brief Description

The R&S®THR9 high-power FM transmitter family makes terrestrial broadcasting of audio broadcast signals extremely efficient and also saves space. These high-power transmitters feature an energy efficiency of up to 75 %. Liquid cooling and the integration of multiple transmitters in a single rack minimize space requirements. Audio broadcast network operators benefit from extremely low energy costs, maximum robustness and minimum maintenance expenses over the entire system lifetime.

The liquid-cooled transmitters deliver FM output power of up to 40 kW per rack and up to 80 kW in two racks. The integration versatility ranges from single transmitters with built-in pump unit and space for additional system components to multitransmitter systems and even N+1 configurations in a single rack. By making it possible to integrate high output powers as well as multiple transmitters, Rohde & Schwarz offers the highest power density per rack.

The R&S®THR9 transmitter family for band II attains efficiency values of up to 75 % in analog FM mode. Unlike air-cooled FM transmitters, the R&S®THR9 incorporates a completely redundant and highly efficient transmitter cooling infrastructure. As a result, the cooling infrastructure and the transmitters are perfectly matched, which offers major advantages in 24/7 operation. The R&S®THR9 highpower transmitter family supports the hybrid HD Radio standard (IBOC) as well as purely digital standards in band II.

Specifications

Standards   FM, HD Radio™; other standards on request
Channel bandwidth FM 200 kHz
  FM, HD Radio™ 400 kHz
Inputs FM analog audio L
analog audio R
digital AES/EBU
MPx/RDS/SCA1
MPx/RDS/SCA2
pilot out
  FM, HD Radio™ digital AES/EBU1,
MPx/RDS/SCA
TS LAN1, RJ-45; E2X/I2E data;
TS LAN2, RJ-45; E2X/I2E data
RF output   1 5/8" EIA, 3 1/8" EIA
General data
Frequency range VHF band II 87.5 MHz to 108 MHz
VSWR nominal power up to 1.5
  power reduction 1.5 to 3.0
  automatic shutdown > 3.0
Supply voltage   400 V/230 V, 4 wires + PE (L1/L2/L3/N/PE) ±15 %;
208 V, 3 wires + PE (L1/L2/L3/PE) ± 15 %;
220 V, 3 wires + PE (L1/L2/L3/PE) ± 15 %;
240 V, 3 wires + PE (L1/L2/L3/PE) –15 %/+10 %
Max. installation height   2000 m above sea level
> 2000 m on request
Operating temperature range   +1 °C to +45 °C
Relative humidity (max.)   95 %, noncondensing
Immunity 1)
  to fast transients and burst
in line with IEC 61000-4-4
< 4 kV (AC supply),
< 1 kV (signal inputs)
  to surges
in line with IEC 61000-4-5
symmetrical < 2 kV (e.g. L1-L2),
asymmetrical < 4 kV (e.g. L1-N)
Cooling liquid-cooled
Cooling configuration for single transmitters automatic fan speed adjustment according to coolant temperature
  for multitransmitter systems automatic adjustment of fan speed based on coolant temperature and calculation of necessary coolant flow
Coolant   Antifrogen N/water (39 %/61 %)
Operation
Status panel with buttons and LEDs   local operation
Display unit with touchscreen and LEDs optional local operation and display
Ethernet interface, RJ-45   local, remote, standard web interface
  optional network management interface via SNMP
Parallel remote interface optional floating contacts for messages and commands

1) With built-in AC overvoltage protection; more stringent requirements must be satisfied by implementing appropriate measures at the transmitter site.

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