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diff --git a/Transceiver52M/device/usrp1/USRPDevice.h b/Transceiver52M/device/usrp1/USRPDevice.h
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+++ b/Transceiver52M/device/usrp1/USRPDevice.h
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+/*
+* Copyright 2008 Free Software Foundation, Inc.
+*
+* This software is distributed under multiple licenses; see the COPYING file in the main directory for licensing information for this specific distribuion.
+*
+* This use of this software may be subject to additional restrictions.
+* See the LEGAL file in the main directory for details.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+*/
+
+#ifndef _USRP_DEVICE_H_
+#define _USRP_DEVICE_H_
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "radioDevice.h"
+
+#include <usrp/usrp_standard.h>
+#include <usrp/usrp_bytesex.h>
+#include <usrp/usrp_prims.h>
+#include <sys/time.h>
+#include <math.h>
+#include <string>
+#include <iostream>
+
+#include <boost/shared_ptr.hpp>
+typedef boost::shared_ptr<usrp_standard_tx> usrp_standard_tx_sptr;
+typedef boost::shared_ptr<usrp_standard_rx> usrp_standard_rx_sptr;
+
+/** A class to handle a USRP rev 4, with a two RFX900 daughterboards */
+class USRPDevice: public RadioDevice {
+
+private:
+
+  static const double masterClockRate; ///< the USRP clock rate
+  double desiredSampleRate; 	///< the desired sampling rate
+  usrp_standard_rx_sptr m_uRx;	///< the USRP receiver
+  usrp_standard_tx_sptr m_uTx;	///< the USRP transmitter
+
+  db_base_sptr m_dbRx;          ///< rx daughterboard
+  db_base_sptr m_dbTx;          ///< tx daughterboard
+  usrp_subdev_spec rxSubdevSpec;
+  usrp_subdev_spec txSubdevSpec;
+
+  int sps;
+  double actualSampleRate;	///< the actual USRP sampling rate
+  unsigned int decimRate;	///< the USRP decimation rate
+
+  unsigned long long samplesRead;	///< number of samples read from USRP
+  unsigned long long samplesWritten;	///< number of samples sent to USRP
+
+  bool started;			///< flag indicates USRP has started
+  bool skipRx;			///< set if USRP is transmit-only.
+
+  static const unsigned int currDataSize_log2 = 21;
+  static const unsigned long currDataSize = (1 << currDataSize_log2);
+  short *data;
+  unsigned long dataStart;
+  unsigned long dataEnd;
+  TIMESTAMP timeStart;
+  TIMESTAMP timeEnd;
+  bool isAligned;
+
+  Mutex writeLock;
+
+  short *currData;		///< internal data buffer when reading from USRP
+  TIMESTAMP currTimestamp;	///< timestamp of internal data buffer
+  unsigned currLen;		///< size of internal data buffer
+
+  TIMESTAMP timestampOffset;       ///< timestamp offset b/w Tx and Rx blocks
+  TIMESTAMP latestWriteTimestamp;  ///< timestamp of most recent ping command
+  TIMESTAMP pingTimestamp;	   ///< timestamp of most recent ping response
+
+  long long  pingOffset;
+  unsigned long hi32Timestamp;
+  unsigned long lastPktTimestamp;
+
+  double rxGain;
+
+#ifdef SWLOOPBACK
+  short loopbackBuffer[1000000];
+  int loopbackBufferSize;
+  double samplePeriod;
+
+  struct timeval startTime;
+  struct timeval lastReadTime;
+  bool   firstRead;
+#endif
+
+ public:
+
+  /** Object constructor */
+  USRPDevice(size_t sps);
+
+  /** Instantiate the USRP */
+  int open(const std::string &, int, bool);
+
+  /** Start the USRP */
+  bool start();
+
+  /** Stop the USRP */
+  bool stop();
+
+  /** Set priority not supported */
+  void setPriority(float prio = 0.5) { }
+
+  enum TxWindowType getWindowType() { return TX_WINDOW_USRP1; }
+
+  /**
+	Read samples from the USRP.
+	@param buf preallocated buf to contain read result
+	@param len number of samples desired
+	@param overrun Set if read buffer has been overrun, e.g. data not being read fast enough
+	@param timestamp The timestamp of the first samples to be read
+	@param underrun Set if USRP does not have data to transmit, e.g. data not being sent fast enough
+	@param RSSI The received signal strength of the read result
+	@return The number of samples actually read
+  */
+  int readSamples(std::vector<short *> &buf, int len, bool *overrun,
+                  TIMESTAMP timestamp = 0xffffffff, bool *underrun = NULL,
+                  unsigned *RSSI = NULL);
+  /**
+        Write samples to the USRP.
+        @param buf Contains the data to be written.
+        @param len number of samples to write.
+        @param underrun Set if USRP does not have data to transmit, e.g. data not being sent fast enough
+        @param timestamp The timestamp of the first sample of the data buffer.
+        @param isControl Set if data is a control packet, e.g. a ping command
+        @return The number of samples actually written
+  */
+  int writeSamples(std::vector<short *> &bufs, int len, bool *underrun,
+                   TIMESTAMP timestamp = 0xffffffff, bool isControl = false);
+
+  /** Update the alignment between the read and write timestamps */
+  bool updateAlignment(TIMESTAMP timestamp);
+
+  /** Set the transmitter frequency */
+  bool setTxFreq(double wFreq, size_t chan = 0);
+
+  /** Set the receiver frequency */
+  bool setRxFreq(double wFreq, size_t chan = 0);
+
+  /** Returns the starting write Timestamp*/
+  TIMESTAMP initialWriteTimestamp(void) { return 20000;}
+
+  /** Returns the starting read Timestamp*/
+  TIMESTAMP initialReadTimestamp(void) { return 20000;}
+
+  /** returns the full-scale transmit amplitude **/
+  double fullScaleInputValue() {return 13500.0;}
+
+  /** returns the full-scale receive amplitude **/
+  double fullScaleOutputValue() {return 9450.0;}
+
+  /** sets the receive chan gain, returns the gain setting **/
+  double setRxGain(double dB, size_t chan = 0);
+
+  /** get the current receive gain */
+  double getRxGain(size_t chan = 0) { return rxGain; }
+
+  /** return maximum Rx Gain **/
+  double maxRxGain(void);
+
+  /** return minimum Rx Gain **/
+  double minRxGain(void);
+
+  /** sets the transmit chan gain, returns the gain setting **/
+  double setTxGain(double dB, size_t chan = 0);
+
+  /** return maximum Tx Gain **/
+  double maxTxGain(void);
+
+  /** return minimum Rx Gain **/
+  double minTxGain(void);
+
+  /** sets the RX path to use, returns true if successful and false otherwise */
+  bool setRxAntenna(const std::string &ant, size_t chan = 0);
+
+  /* return the used RX path */
+  std::string getRxAntenna(size_t chan = 0);
+
+  /** sets the RX path to use, returns true if successful and false otherwise */
+  bool setTxAntenna(const std::string &ant, size_t chan = 0);
+
+  /* return the used RX path */
+  std::string getTxAntenna(size_t chan = 0);
+
+  /** Return internal status values */
+  inline double getTxFreq(size_t chan = 0) { return 0; }
+  inline double getRxFreq(size_t chan = 0) { return 0; }
+  inline double getSampleRate() { return actualSampleRate; }
+  inline double numberRead() { return samplesRead; }
+  inline double numberWritten() { return samplesWritten; }
+
+  std::vector<std::string> tx_paths, rx_paths;
+};
+
+#endif // _USRP_DEVICE_H_