diff --git a/src/algorithms/signal_source/adapters/zmq_signal_source.cc b/src/algorithms/signal_source/adapters/zmq_signal_source.cc
index 66d931760..e87064ff2 100644
--- a/src/algorithms/signal_source/adapters/zmq_signal_source.cc
+++ b/src/algorithms/signal_source/adapters/zmq_signal_source.cc
@@ -17,6 +17,7 @@
 #include "zmq_signal_source.h"
 #include "configuration_interface.h"
 #include "gnss_sdr_string_literals.h"
+#include <glog/logging.h>
 
 using namespace std::string_literals;
 
@@ -25,55 +26,52 @@ ZmqSignalSource::ZmqSignalSource(const ConfigurationInterface* configuration,
     unsigned int /* in_stream [[maybe_unused]] */,
     unsigned int /* out_stream [[maybe_unused]] */,
     Concurrent_Queue<pmt::pmt_t>* /* queue [[maybe_unused]] */)
-    : SignalSourceBase(configuration, role, "ZMQ_Signal_Source"s)  //
-      ,
-      d_item_size(decode_item_type(configuration->property(role + ".item_type"s, "gr_complex"s), nullptr, true))
+    : SignalSourceBase(configuration, role, "ZMQ_Signal_Source"s),
+      d_item_size(decode_item_type(configuration->property(role + ".item_type"s, "gr_complex"s), nullptr, true)),
+      d_dump_filename(configuration->property(role + ".dump_filename"s, "data/zmq_dump.dat"s)),
+      d_dump(configuration->property(role + ".dump"s, false))
 {
     auto vlen = configuration->property(role + ".vlen"s, 1);
     auto pass_tags = configuration->property(role + ".pass_tags"s, false);
     auto timeout_ms = configuration->property(role + ".timeout_ms"s, 100);
     auto hwm = configuration->property(role + ".hwm"s, -1);
 
-    // Each .endpointN must be specified
-    for (auto n = 0u; n < getRfChannels(); ++n)
-        {
-            auto property = role + ".endpoint"s + std::to_string(n);
-            auto endpoint = configuration->property(property, ""s);
-            if (not endpoint.empty())
-                {
-                    LOG(INFO) << "Connecting to ZMQ pub at " << endpoint;
-                    d_source_blocks.push_back(gr::zeromq::sub_source::make(d_item_size, vlen, endpoint.data(), timeout_ms, pass_tags, hwm));
-                }
-            else
-                {
-                    std::cerr
-                        << "For ZMQ_Signal_Source " << role << ", the .endpointN property must be defined\n"
-                        << "for all values of N from 0 to " << getRfChannels() - 1 << std::endl;
+    auto property = role + ".endpoint"s;
+    auto endpoint = configuration->property(property, ""s);
 
-                    throw std::invalid_argument(property + ": undefined");
-                }
+    if (not endpoint.empty())
+        {
+            LOG(INFO) << "Connecting to ZMQ pub at " << endpoint;
+            d_source_block = gr::zeromq::sub_source::make(d_item_size, vlen, endpoint.data(), timeout_ms, pass_tags, hwm);
+        }
+    else
+        {
+            std::cerr << "For ZMQ_Signal_Source " << property << " must be defined" << std::endl;
+            throw std::invalid_argument(property + ": undefined");
         }
 }
 
 
 auto ZmqSignalSource::item_size() -> size_t { return d_item_size; }
 
-auto ZmqSignalSource::connect(gr::top_block_sptr /* top_block [[maybe_unused]] */) -> void
+auto ZmqSignalSource::connect(gr::top_block_sptr top_block) -> void
 {
-    // for now, nothing to connect
+    if (d_dump)
+        {
+            d_dump_sink = gr::blocks::file_sink::make(item_size(), d_dump_filename.data());
+            top_block->connect(d_source_block, 0, d_dump_sink, 0);
+        }
 }
 
-auto ZmqSignalSource::disconnect(gr::top_block_sptr /* top_block [[maybe_unused]] */) -> void
+auto ZmqSignalSource::disconnect(gr::top_block_sptr top_block) -> void
 {
-    // for now, nothing to disconnect
+    if (d_dump)
+        {
+            top_block->disconnect(d_dump_sink);
+        }
 }
 
 auto ZmqSignalSource::get_right_block() -> gr::basic_block_sptr
 {
-    return d_source_blocks.front();
-}
-
-auto ZmqSignalSource::get_right_block(int RF_channel) -> gr::basic_block_sptr
-{
-    return d_source_blocks.at(RF_channel);  // throws std::out_of_range
+    return d_source_block;
 }
diff --git a/src/algorithms/signal_source/adapters/zmq_signal_source.h b/src/algorithms/signal_source/adapters/zmq_signal_source.h
index 07b3ecace..dc33c1c0e 100644
--- a/src/algorithms/signal_source/adapters/zmq_signal_source.h
+++ b/src/algorithms/signal_source/adapters/zmq_signal_source.h
@@ -20,6 +20,7 @@
 #include "signal_source_base.h"
 //
 #include "concurrent_queue.h"
+#include <gnuradio/blocks/file_sink.h>  // for dump
 #include <gnuradio/zeromq/sub_source.h>
 #include <pmt/pmt.h>
 
@@ -30,18 +31,18 @@
 
 //! This class supports the following properties:
 //!
+//!   .endpoint   - the ZMQ endpoint to be connected to
+//!   .vlen       - vector length of the input items (default 1, one item)
+//!                 this must match the size of the publisher!
 //!   .pass_tags  - boolean flag if tags should be propagated (default false)
 //!   .timeout_ms - receive timeout, in milliseconds (default 100)
 //!   .hwm        - ZMQ high water mark (default -1, ZMQ default)
-//!   .vlen       - vector length of the input items (default 1, one item)
-//!   .endpointN  - the ZMQ endpoint to be connected to (repeat for each channel)
 //!
 //!   .item_type - data type of the samples (default "gr_complex")
 //!
 //! (probably should be abstracted to the base class)
 //!
-//!   .dump     - whether to archive input data
-//!
+//!   .dump          - whether to archive input data
 //!   .dump_filename - if dumping, path to file for output
 //!
 
@@ -61,12 +62,14 @@ public:
     auto connect(gr::top_block_sptr top_block) -> void override;
     auto disconnect(gr::top_block_sptr top_block) -> void override;
     auto get_right_block() -> gr::basic_block_sptr override;
-    auto get_right_block(int RF_channel) -> gr::basic_block_sptr override;
 
 private:
-    std::vector<gr::zeromq::sub_source::sptr> d_source_blocks;
+    gr::zeromq::sub_source::sptr d_source_block;
+    gr::blocks::file_sink::sptr d_dump_sink;
 
     size_t d_item_size;
+    std::string d_dump_filename;
+    bool d_dump;
 };
 
 /** \} */